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NBS Technical Note 1212

A Computerized Fracture

Mechanics Database for

Oxide Glasses

S.W. Freiman, T.L. Baker, and J.B. Wachtman, Jr.

Library

National Bureau

of Standards

ML 31 1385

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ted >! Boulder, ( O, with some elements hi Gaithersburg, MI).
NATIONAL BUREAU OF STANDARDS

UBRAK.Y

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NBS Technical Note 1212

A Computerized Fracture

Mechanics Database for

Oxide Glasses

S.W. Freiman and T.L. Baker

Inorganic Materials Division Center for Materials Science National Bureau of Standards

Gaithersburg, Maryland 20899

J.B. Wachtman, Jr.

Rutgers University Center for Ceramics Research

Piscataway, New Jersey 08854

Issued June 1985

""EAU °(

U.S. Department of Commerce

Malcolm Baldrige, Secretary National Bureau of Standards

Ernest Ambler, Director
National Bureau of Standards U.S. Government Printing Office For sale by the Superintendent

Technical Note 1212 Washington: 1985 of Documents,

Natl. Bur. Stand. (U.S.) U.S. Government Printing Office. Tech. Note 1212, Washington, DC 20402

91 -pages (June 1985) CODEN: NBTNAE
Contents

Page

1

Introduction 1

2. Design of the Fracture Mechanics Data Base 2

3. Design of the Computer Programs and Files 2

4. Results 4

5. Discussion of Results 83

6. Summary 87

in

A Computerized Fracture Mechanics Database for Oxide Glasses

S. W. Freiman and T. L. Baker

Inorganic Materials Division, National Bureau of Standards, Gaithersburg, MD 20899 and

J. B. Wachtman, Jr.

Rutgers University, Center for Ceramics Research, Piscataway, NJ 08854

Values of critical fracture toughness (K\C), fracture energy (y), subcritical crack growth exponents («) and

Young's modulus (E), are compiled and tabulated for a wide variety of oxide glasses. A computerized data retrieval system has been formulated to allow for selection of data by either glass composition, investigator, or experimental

technique, and year. Plotting routines allow KiC or y to be plotted versus either the mole % of a particular

component or the Young's modulus of the glass. A few illustrations are given to demonstrate trends in KiC and y

as a function of composition and elastic modulus.

Key words: crack growth exponents; elastic modulus; fracture database; fracture mechanics; fracture toughness; oxide glasses.

1. Introduction

The strength of glass and other brittle materials has long been known to depend on the size and character

of flaws. The strength of a particular specimen of glass depends on both the severity of the most serious flaw

(an extrinsic property of the glass) and the resistance of the glass to flaw propagation (thought to be an intrinsic property of the glass). The theory of linear elastic fracture mechanics predicts that for a simple crack of length

C the strength S will be given by

5 = Klc/{YC U2

) (1)

where Y is a numerical constant that depends on flaw location and geometry and Klc is the critical stress intensity factor, usually taken to be an intrinsic property of the material. An entire theory and methodology of design has been developed for brittle materials based on linear elastic fracture mechanics. It is recognized that Klc , will change with glass composition. However, all of the aspects

of composition which affect the critical stress intensity factor are not sufficiently well understood to achieve

the goal of being able to predict those glasses which have optimum fracture toughness as well as possess the

other properties required by the application. Accordingly, there is both scientific and technological interest in examining the whole body of fracture mechanics data for glasses to see how well critical stress intensity values can be understood in terms of the character of the glasses.

The foregoing discussion relates to cases in which no environmentally enhanced slow crack propagation

occurs prior to sudden failure, i.e. in inert environments, or to rapid-fracture measurements in which any slow

crack propagation has a minimal effect on the strength. The phenomenon of moisture-assisted slow crack

growth occurs to some extent in every oxide glass of which we are aware, and so must be accounted for in structural design. The rate of crack propagation is a strong function of the stress intensity factor, Kh at the flaw. The external factors of crack size and shape can be taken into account through eq (1). An equation widely used

to fit crack growth data over large ranges of crack propagation rates is:

V = A K{ (2)

where V is the crack velocity and A and n are empirical constants that depend on glass composition as well as the external environment. A methodology for safe-life design with materials that undergo slow crack propaga1
tion has been developed based on eqs (1) and (2). Again it is recognized that the constants A and n may vary

if the composition varies within a family of glasses. As before, it is hoped that the factors affecting the above

constants can be sufficiently understood, specified, and controlled to permit reliable engineering use. The time is ripe for the development of a comprehensive compilation of the available fracture mechanics

data on glasses. On one level, it is appropriate to inquire if the accumulated data are sufficiently consistent to form a useful guide in the choice of glass compositions for load-bearing applications. On another level, one can

ask if the existing data show trends, such as dependence on composition, useful in developing new glasses or

in further understanding fracture behavior. In addition, such a compilation is the first step in evaluating the

quality of this data. The present paper describes a computerized fracture mechanics data base and associated

computer programs which permit extension and modification of the data base as well as selection, plotting and

curve fitting. Some preliminary results of correlations of fracture energy, y, and critical stress intensity factor

A'ic with composition and elastic modulus are presented.

2. Design of the Fracture Mechanics Data Base

The form of the fracture mechanics data base was designed with several ideas in mind. The following

information was included:

1. Primary parameters such as Klc, n, etc., required for engineering design for glass structure.

2. Secondary parameters, e.g. elastic modulus.

3. Test methods and environmental factors.

4. Manufacturers and engineering designations for commercial glasses.

5. References.

The design is intended to be as open-ended as possible and the data base should be capable of expansion

in the number of records it contains. 1 The data base should be computer searchable in detail; i.e., for each

record, each type of information is formatted to be available for analysis without further personal judgment

being required. The data base is in a form generally accessible for computer research by other users; i.e., it is in a format and language generally available and likely to remain in use. For this data base, fracture energy and the related quantity, critical fracture toughness, were chosen as the

primary variables. The slow crack-propagation constant, n , and Young's modulus, E, were also compiled when

available. A survey of published literature as well as private sources, i.e., government reports and corporate

data, suggested that about 300 measurements are available on reasonably well-characterized glasses. For each

measurement, the number of associated items making up a record can be as large as 25. An expansion of a factor of 2 in the number of records in the next few years seems possible, and was taken as a data base design goal.

The resulting size, though substantial in terms of data bases to be manually developed and analyzed, is not very

large by computer standards. Flexibility rather than efficiency in use of computer memory or speed was

therefore taken as the primary goal.

3. Design of the Computer Programs and Files

In anticipation of possible future use by a variety of persons with minimal programming knowledge, all programs were written in menu-driven style and in a simple language (Basic). In anticipation of possible use in small organizations which might lack large center computers, the programs and files were subdivided into units which can be run on the current generation of stand-alone laboratory microcomputers. That is, the computer

only needs Basic, a minimum of 128 kilobytes of memory, and floppy disk storage of at least 160 kilobytes per

diskette. To keep within these limits, the file-creating program was kept separate from the file-analysis

program.

The file creating program has been designed to ask the keyboard operation for the following information

for each record:

1

.

The record number

2. The first previous record number for the same glass

3. A generic description of the glass (e.g., aluminosilicate)

4. A specific description of the glass (e.g., a commercial specification)

'The term record is taken to mean the complete set of information associated with each independent measurement of a fracture mechanics

parameter.
5. Manufacturers name when appropriate

6. Indication of whether composition will be input in mole percent (M) or weight percent (W). 1

7. The percentage of each of the following in mole or weight percent:

a. A12 3 b. B2 3 c. CaO

d. MgO

e. Na2

f. K2 g. Pb02 h. Si02

8. The percentage of any two other oxides specified by the user

9. Young's modulus in units of MPa

10. The fracture mechanics data itself:

a. the test method (see table 1 for abbreviations used for the test methods).

b. the critical stress intensity in units of MPa m

l/2

. 3

c. the fracture energy in units of J/m2

. 3

11. Same as 10 but for a second measurement method when appropriate.

12. The crack growth exponent, n.

13. The test environment.4

14. The reference.

15. Comments.

Table 1. Abbreviations used in the computerized data base for the test methods used.

Abbreviation Test method NB Notched Beam DCB Double Cantilever Beam AMDCB Applied Moment Double Cantilever Beam DT Double Torsion

Ind. Crk. Len. Indentation Crack Length

Controlled Flaw Controlled Flaw

Static Fat. Static Fatigue

Dynamic Fat. Dynamic Fatigue

Short bar Short Bar

Table 2. List of environments used by various authors

air, x % RH (i.e. air with x % relative humidity)

H2 D.I. H2 (i.e. deionized water) N2 (1) at - 196°C (i.e. liquid nitrogen at - 196°C) Heptane

N2 (1) (i.e. liquid nitrogen)

N2 (g) (i.e. nitrogen gas) Vacuum

Toluene

Mineral oil

1 M Cs in D.I. H2 (i.e. 1 Molar Cs in deionized water)

1 M Li in D.I. H2 (i.e. 1 Molar Li in deionized water)

6 N NaOH (i.e. 6 Normal NaOH)

6 N HC1 (i.e. 6 Normal HC1)

2 When the input is in weight percent, a subroutine in the program enables the user to convert these values to mole percent, and a C is placed

in Item 6 to indicate the calculation has been done.

3When either b or c alone is given and a value for Young's modulus is present, the program calculates the other from the identity (ATiC =

2Ey) yl where E is Young's modulus.

4 Both the relative humidity of air, the chemical activity of water in solutions and the pH value in solutions are known to affect the slow

crack propagation parameters and may affect other fracture mechanics parameters unless the test is conducted very rapidly. The various environments that have been used are listed in table 2.

3
To reduce effort in keyboarding, the program allows duplication of earlier data (such as the reference) by

a single keystroke when appropriate. Each record is written to permanent storage on a diskette before entry

of the next record.

The file-analysis program as currently written provides for a search of the file for any combination of the

following keys:

1. Generic material

2. Specific material designation

3. Presence of a first specified oxide

4. Presence of a second specified oxide

5. Presence of a third specified oxide

6. Test techniques

7. Principal author

8. Year

Following the search and selection of the appropriate data, this program provides the option of plotting

with the critical stress intensity factor, the fracture energy, or the crack velocity parameter as the independent

variable. Any of these parameters may be plotted as a function of Young's modulus, or the mole percentage of one of the specified oxides. Provision for fitting and plotting a straight line or a quadratic least squares fit to the data is also provided. Also, Young's modulus may be plotted as a function of composition.

4. Results

The current data base consists of 291 separate records, some of which contain measurements of y or ATIC obtained by more than one technique. In some instances, a record will contain a value of the crack growth

exponent, n, instead of y or Klc - The entire list of records is given in table 3. Because table 3 is not ordered with

respect to composition, author etc., finding a specific set of data could be difficult. Therefore, we have

constructed additional tables 4-7 which contain the four major compositional categories of these glasses, i.e. silicate (Si02 ), borate (B2 3 ), phosphate (P2 3 ), and germanate (Ge02 ). Within each table the data is listed in order of decreasing amounts of the primary constituent of the glass. At the end of each different glass

composition is the reference indicating the source of the data. Each reference, which is included in its entirety

in table 3, has been abbreviated and is broken down in the following manner: "WIE74/1" refers to a paper

which has Wiederhorn as the primary author and is the first of two papers written by him in 1974. If there is only one paper by a particular author in one year, no /# will be suffixed to the reference.
Table 3. Fracture mechanics parameters for oxide glasses

ASH82

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 =

Other Formula = P2 Os Other %

Other Formula = Other %

Young's Modulus = 5.85 EA

1st Technique = Ind. Crk. Len. 2nd Technique =

n =

% CaO = 50

% PbO =

= 50

Klc = .7

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No. 5, 1982

Comments =

% CaO

% PbO

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 =

Other Formula = SrO Other % = 50

Other Formula = P2 Os Other % = 50

Young's Modulus = 5.0 E4

1st Technique = Ind. Crk. Len. 2nd Technique = Klc = .61

n =

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No. 5, 1982

Comments =

% MgO

% SiO, :

Gamma

Gamma = 4.19

% MgO

% SiQ2

:

Gamma

Gamma = 3.72

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % SiQ2 =

Other Formula = BaO Other % = 50

Other Formula = P2 Os Other % = 50

Young's Modulus = 4.32 EA

1st Technique = Ind. Crk. Len. Klc = .49 Gamma = 2.78 2nd Technique = -K'ic = Gamma =

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No. 5, 1982

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO == 50

% Na2 = % K2 = % PbO = % Si02 =

Other Formula = P2 5 Other % = 50

Other Formula = Other % =

Young's Modulus = 5.4 E4

1st Technique = Ind. Crk. Len. Klc = .95 Gamma = 8.36 2nd Technique = ^IC = Gamma =

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No., 5, 1982

Comments =
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula = ZnO Other % = 50

Other Formula = P2Os Other % = 50

Young's Modulus = 4.24 E4

1st Technique = Ind. Crk. Len. Klc = .6 Gamma = 4.25 2nd Technique = A^ic = Gamma —

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No. 5, 1982

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 50 % K2 = % PbO = % Si02 =

Other Formula = P2 Os Other % = 50

Other Formula = Other % =

Young's Modulus = 3.45 E4

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 =

Other Formula = Li2 Other % = 50

Other Formula = P2 Os Other % = 50

Young's Modulus = 4.9 E4

1st Technique = Ind. Crk. Len. 2nd Technique =

1st Technique = Ind. Crk. Len. KiC = .35 Gamma = 1.78 2nd Technique = Ktc = Gamma =

n =

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No. 5, 1982

Comments =

% CaO = % MgO

% PbO = % SiQ2

:

Klc = .57 Gamma = 3.32 Kic = Gamma =

n =

Environment = air Reference = ASHIZUKA,M.,BRADT,R., JACTAW, Vol. 65, No. 5, 1982

Comments =

BRU77

Specific Material =

Manufacturer = % A12 3 =1.16

% Na2 = 13.4 Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DT Klc = 77 Gamma =

2nd Technique = Klc = Gamma =

n =

Environment = Toluene

Reference = BRUCE,J.,KOEPKE,B., JACTAW, Vol. 60, No. 5-6, 1977

Comments =

% B2 3 = % K2 = .632 Other % =

Other % =

% CaO = 7.43 % MgO = 5.91 % PbO = % SiQ2 = 71.3
Specific Material =

Manufacturer = % A12 3 = 1.16 % B2 3 = % CaO = 7.43 % MgO = 5.91 % Na2 = 13.4 % K2 = .632 % PbO = % Si02 = 71.3 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DT Klc = .77 Gamma =

2nd Technique = ^IC = Gamma =

ft =: Environment = Mineral oil Reference = BRUCE.J.,KOEPKE,B., JACTAW, Vol. 60, No. 5-6, 1977

Comments =

Specific Material =

Manufacturer = % A12 3 = 1.16 % B2 3 = % CaO = 7.43 % MgO = 5.91 % Na2 = 13.4 % K2 = .632 % PbO = % Si02 = 71.3 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DT Klc = .76 Gamma =

2nd Technique = A'lc = Gamma =

Environment = air Reference = BRUCEJ.,KOEPKE,B., JACTAW, Vol. 60, No. 5-6, 1977

Comments =

CHA58

Specific Material = 0080

Manufacturer = Corning Glass

% A12 3 = 1.76 % B2 3 = % CaO = 5.35 % MgO = 4.46

% Na2 = 16.4 % K2 = % PbO = % Si02 = 71.9 Other Formula = Other % =

Other Formula = Other % =

Klc

Young's Modulus =

1st Technique = Dynamic Fat. 2nd Technique =

n = 16 Environment = air, 50% RH

Reference = CHARLES,R.J., Jour, of Appl. Phys., 29, 1657-62, 1958

Comments = Surface condition-abraded

Gamma

Gamma

EAG78

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 40 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 £4

1st Technique = NB A"IC - .62 Gamma = 3 2nd Technique —

VI —

K\C — Gamma =

It —

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

15
Specific Material =

Manufacturer = % A12 3 = 8 % B2 3 = % Na2 = 32 % K2 =

Other Formula = Other %

Other Formula = Other %

Young's Modulus = 6.9 £4

1st Technique = NB

2nd Technique =

% CaO

% PbO

Klc = .64

n =

% MgO = % SiQ2 = 60

Gamma = 2.97 Gamma =

Environment = air Reference - EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 =16.2 % B2 3 = % CaO = % MgO = % Na2 = 23.8 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.25 EA

1st Technique = NB Klc = .62 Gamma = 2.61 2nd Technique = ^IC = Gamma =

ft ^

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 = 20 % B2 3 = % CaO = % MgO = % Na2 = 20 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.3 EA

1st Technique = NB Klc = .67 Gamma = 3.10 2nd Technique = ^IC = Gamma =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 = 22.8 % B2 3 = % CaO = % MgO = % Na2 = 17.2 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.8 EA

1st Technique = NB Klc = .70 Gamma = 3.10 2nd Technique = K\c — Gamma ==

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =
B2 3 =

K2 =

Other %

Other %

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = 20 % K2 = % PbO

Other Formula =

Other Formula =

Young's Modulus = 6.1 EA

1st Technique = NB K1C = -58 2nd Technique = KiC =

n =

Environment = air Reference = EAGAN) R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

% MgO = % SiQ2 = 80

Gamma = 2.76 Gamma =

Specific Material =

Manufacturer = % A12 3 = 5 % B2 3 = % Na2 = 20 % K2 =

Other Formula = Other %

Other Formula = Other %

Young's Modulus = 6.4 EA

1st Technique = NB

2nd Technique =

% CaO

% PbO

Klc = .63 Kic =

% MgO

% SiQ2

: 75

Gamma =

Gamma =

3.10

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 =10 % B2 3 = % CaO = % MgO = % Na2 = 20 % K2 = % PbO = % Si02 = 70

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.9 EA

1st Technique = NB K1C = .67 Gamma = 3.25 2nd Technique = K\c = Gamma =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 = 20 % B2 3 = % CaO = % MgO = % Na2 = 20 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.25 EA

1st Technique = NB Klc = .67 Gamma = 3.10 2nd Technique = Kic = Gamma =

ft ^

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =
Specific Material =

Manufacturer = % A12 3 = 24 % B2 3 = % Na2 = 20 % K2 =

Other Formula = Other %

Other Formula = Other %

Young's Modulus = 7.75 E\

1st Technique = NB

2nd Technique =

% CaO

% PbO

Klc = .67

% MgO = % SiQ2 = 56

Gamma = 2.85 Gamma =

n =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW) Vol 61, No 1-2, 27-30, J978

Comments =

Specific Material =

Manufacturer = % A12 3 = 32 % B2 3 = % CaO = 8 % MgO = % Na2 = % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 9.3 E4

1st Technique = NB KIC = .6 Gamma = 1.94 2nd Technique = K\c = Gamma =

ft ^

Environment = air Reference = EAGAN,R.,SWEARENGEN,J..JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 =13.3 % B2 3 = % CaO = 26." % MgO = % Na2 = % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 9.2 E4

1st Technique = NB Klc = .65 Gamma = 2.26 2nd Technique = K\c — Gamma =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 = 20 % B2 3 = % CaO = 20 % MgO = % Na2 = % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 9.35 EA

1st Technique = NB Kic = -66 Gamma = 2.29 2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

10
Specific Material =

Manufacturer = % A12 3 = 22.8 % B2 Oj = % CaO = 17.2 % MgO = % Na2 = % K2 = % PbO — % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 9.8 E4-

1st Technique = NB Kic = -66 Gamma = 2.19 2nd Technique = ^IC = Gamma =

fi == Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 40 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.1 E4

1st Technique = NB Klc = .63 Gamma = 3.20 2nd Technique =

M ^IC = Gamma =

At —

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 8 % CaO = % MgO = % Na2 = 32 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.5 E4

1st Technique = NB Klc = .75 Gamma = 4.33 2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

B2 3 = 16.2 K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = 23.8 %

Other Formula =

Other Formula =

Young's Modulus = 8.4 EA

1st Technique = NB

2nd Technique =

n =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

% CaO

% PbO

Klc = .94

% MgO = % SiQ2 = 60

Gamma =

Gamma =

5.26

11
% B2 3 = 20

% K2 =

Other % = Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 20 % CaO

% Na2 = 20 % K2 = % PbO

Other Formula =

Other Formula =

Young's Modulus = 8.2 EA

1st Technique = NB KiC = .1 2nd Technique = Kxc =

n =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

% MgO = % SiQ2 = 60

Gamma = 4.72 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 22.8 % CaO = % MgO = % Na2 - 17.2 % K2 = % PbO = % Si02 = 60

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 8.6 E4

1st Technique = NB Klc = .92 Gamma = 4.89 2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = EAGAN,R.,SWEARENGEN,J.,JACTAW, Vol 61, No 1-2, 27-30, 1978

Comments =

FRE83

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO - % Na2 = % K2 = % PbO = % Si02 = 67

Other Formula — Li2 Other % = 33 Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ^1C = Gamma =

2nd Technique = ^IC = Gamma =

n = 11 Environment = H2 Reference = FREIMAN.S.W., Private Communications, 1983

Comments =

Specific Material = Low Iron Float

Manufacturer = % A12 3 = 1.16 % B2 3 = %

% Na2 = 13.4 % K2 - .632 %

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB KiC =

2nd Technique = K\c = n = 19.3 Environment — H2 Reference = FREIMAN, S.W., et al, Submitted to JACTAW, 1983

Comments =

CaO =

PbO =

7.43 %

%

MgO = 5.91 SiQ2 = 71.3

Gamma =

Gamma =

12
% B2 3 = % K2 = .632 Other % =

Other % =

Specific Material = Low Iron Float

Manufacturer = % A12 3 = 1.16 % Naa O =13.4

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. Klc =

2nd Technique = KiC =

n = 15.2 Environment = H2 Reference = FREIMAN, S.W., et al, Submitted to JACTAW, 1983

Comments =

% CaO = 7.43 % MgO = 5.91 % PbO = % SiQ2 = 71.3

Gamma

Gamma

Specific Material = 7809

Manufacturer = Corning Glass

% A12 3 = 5.72 % Na2 = 9.41 Other Formula = Ti02 Other Formula = Fe2 3 % Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 25.3 Environment = H2 Reference = FREIMAN

Comments =

% B2 3 = 7.45 % CaO = 2.31 % MgO = 9.41 % K2 = 3.44 % PbO = % Si02 = 71.2 Other % = .405 Other % = < .1W%

^IC = Gamma =

^IC = Gamma =

S.W., et al, Submitted to JACTAW, 1983

Specific Material = 7809

Manufacturer = Corning Glass

% A12 3 = 5.72 % Na2 = 9.41 Other Formula = Ti02 Other Formula = Fe2 3 Young's Modulus =

1st Technique = Dynamic Fat 2nd Technique =

n = 31.4 Environment = H2 Reference = FREIMAN, S.W

Comments =

% B2 3 = 7.45 % CaO = 2.31 % MgO = 9.41 % K2 = 3.44 % PbO = % Si02 = 71.2 Other % = .405 Other % = < .1W%

ic Fat ^IC = Gamma = Klc = Gamma =

et al, Submitted to JACTAW, 1983

Specific Material = 0317

Manufacturer = Corning Glass

% A12 3 =18.8 % B2 3 = 8.08 %

% Na2 = % K2 = %

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB K\c =

2nd Technique = K\C =

n = 25.1 Environment = H2 Reference = FREIMAN, S.W., et al, Submitted to JACTAW, 1983

Comments = % composition - 9.5% modifiers

CaO =

PbO = % MgO = % SiQ2 = 73.0

Gamma =

Gamma =

13
Specific Material = 0317

Manufacturer = Corning Glass

% A12 3 =18.8 % B2 3 = 8.08 % CaO = % Na2 = % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. A^c =

2nd Technique = ^ic —

n = 32.6 Environment = H2 Reference = FREIMAN, S.W., et al, Submitted to JACTAW, 1983

Comments = % composition - 9.5% modifier

% MgO = % SiQ2 = 73.0

Gamma =

Gamma =

FRE84

Specific Material = 8244

Manufacturer = NBS

% A12 3 = %

% Na2 = %

Other Formula = P2 5 Other Formula = La2 3 Young's Modulus = 6.05 EA

1st Technique = Ind. Crk. Len

2nd Technique =

n =

Environment = Heptane

Reference = FREIMAN,S.W.,

Comments = 3rd Other OxideB2 3 . = K2 =

Other % = 74.6 Other % = 25

% CaO = % PbO =

= .58

% MgO = % SiQ2 =

Gamma = 2.78 Gamma =

Private Communications, 1984

0.5% Nd2 3 , & Young's Modulus is estimated

B2 3 = K2 =

Other % = 74.6 Other % =0.5

Specific Material = 8245

Manufacturer = NBS

% A12 3 = 25 %

% Na2 = %

Other Formula = P2 Os Other Formula = Nd2 3 Young's Modulus = 8.7 EA

1st Technique = Ind. Crk. Len. Klc 2nd Technique = ATIC n =

Environment = Heptane

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Young's Modulus is estimated

%

%

CaO

PbO

% MgO

% SiQ2

=

= .58 Gamma

Gamma = 1.93

B2 3 = K2 =

Other % = 74.6 Other % = 0.4

Specific Material = 9023

Manufacturer = GTE

% A12 3 = 25 %

% Na2 = %

Other Formula = P2 Os Other Formula = Nd2 3 Young's Modulus = 8.7 EA

1st Technique = Ind. Crk. Len. Kxc 2nd Technique = KfC n =

Environment = Heptane

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Young's Modulus is estimated

%

%

CaO

PbO

.72

% MgO

% SiQ2

=

Gamma

Gamma = 2.98

14
B2 3 = K2 =

Other %

Other %

70

Specific Material = UP63-6771

Manufacturer = % A12 3 = %

% Na2 = %

Other Formula = P2 5 Other Formula =

Young's Modulus = 4.67 E4

1st Technique = Ind. Crk. Len. K1C 2nd Technique = KiC n —

Environment = N2 (g)

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Compo.- + 10% (La2 3 + Nd2 3 )

%

%

CaO

PbO

.33

% MgO = 20

% SiQ2 =

Gamma = 1.17 Gamma =

B2 3 = K2 = 12 Other % =

Other % =

65

Specific Material = UP37-6830

Manufacturer = % A12 3 = %

% Na2 = %

Other Formula = P2 5 Other Formula =

Young's Modulus = 5.39 EA

1st Technique = Ind. Crk. Len. KiC 2nd Technique = Klc n =

Environment = N2 (g)

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Compo.- + 12% (La2 3 + Nd2 3 )

%

%

CaO

PbO

= .35

% MgO = 12 % SiQ2 =

Gamma = 1.14 Gamma =

Specific Material = UP16-6766

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 = 25

Other Formula = P2 5 Other % = 62

Other Formula = Other % =

Young's Modulus = 4.42 £4

1st Technique = [nd. Crk. Len. 2nd Technique =

% CaO

% PbO

Klc = .33 Klc =

n =

Environment = N2 (g)

Reference = FREIMAN,S.W„

Comments = Compo.- + 13%

Private Communications, 1984

(La2 3 + Nd2 3 )

B2 3 = K2 =

Other %

Other %

69

Specific Material = MJ-4-5288

Manufacturer = % A12 3 =15 %

% Na2 = %

Other Formula = P2 5 Other Formula =

Young's Modulus = 6.72 EA

1st Technique = Ind. Crk. Len

2nd Technique =

n =

Environment = N2 (g)

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Compo.- + 2% (La2 3 + Nd2 3 )

%

%

CaO

PbO

% MgO - % SiQ2 =

Gamma = 1.23 Gamma =

= .55

% MgO = 15 % SiQ2 =

Gamma = 2.25 Gamma =

15
B2 3 =

Specific Material = UP86-6961

Manufacturer = % A12 3 = 9.4 %

% Na2 = % K2 = 9.4 Other Formula = P2 5 Other % = 75.3 Other Formula = La2 3 Other % = 1.6 Young's Modulus = 6.37 E4

1st Technique = Ind. Crk. Len. K1C 2nd Technique = K\C

n =

Environment = Heptane

Reference = FREIMAN.S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.3% Nd2 3

%

%

CaO

PbO

= .37

% MgO = % SiQ2 =

Gamma = 1.08 Gamma =

B2 3 = K2 = 12.5 Other % = 65.1 Other % = 1.7 = .45

Specific Material = UP77-6945

Manufacturer = % A12 3 =16.5 % B2 3 = % CaO

% Na2 = % K2 =12.5 % PbO

Other Formula = P2 Os Other Formula = La2 3 Young's Modulus = 6.55 EA

1st Technique = Ind. Crk. Len

2nd Technique =

n =

Environment = Heptane

Reference = FREIMAN.S.W., Private Communications^ 1984

Comments = Compo.- 3rd Other Oxide- 4.2% Nd2 3

Specific Material

Manufacturer = % A12 3 =11.8 % B2 3 = % CaO

% Na2 = % K2 = 23.6 % PbO

Other Formula =

Other Formula =

Young's Modulus = 5.37 £4

1st Technique = Ind. Crk. Len. Kxc = .33 2nd Technique = Kxc =

n =

Environment = Heptane

Reference = FREIMAN.S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.1% Nd2 3

% MgO = % SiQ2 =

Gamma = 1.55 Gamma =

= un

% B2 3 = % K2 = 23.6 P2O5 Other % = 59

La2 3 Other % = 1.5

% MgO = % SiQ2 =

Gamma = 1.01 Gamma =

Specific Material = UP70-6937

Manufacturer = % A12 3 = 15.9 %

%. Na2 = %

Other Formula = P2 5 Other Formula = La2 3 Young's Modulus = 6.21 EA

1st Technique = Ind. Crk. Len

2nd Technique =

B2 3 = K2 = 15.9 Other %

Other %

= 62.7 = 1.4

% CaO

% PbO

A-,c = -41

% MgO = % SiQ2 =

Gamma = 1.35 Gamma =

Environment = Heptane

Reference = FREIMAN.S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.1% Nd2 3

16
= UP68-6893

% B2 3 = % K2 = 28.3 p2o5 Other % = 56.7 La2 3 Other % = 1.5

Specific Material

Manufacturer = % A12 3 - 9.4 % B2 3 = %

% Na2 = % K2 = 28.3 %

Other Formula =

Other Formula =

Young's Modulus = 4.94 E4

1st Technique = Ind. Crk. Len. Klc 2nd Technique = Klc n =

Environment = Heptane

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.0% Nd2 3

CaO

PbO

= .31

B2 3 = K2 = 18.8 Other % = 65.9 Other % = 1.7

KK

= UP85-6959

% B2 3 = % K2 = 14.1 P2O5 Other % = 70.6 La2 3 Other % = 1.6

Specific Material = UP84-6957

Manufacturer = % A12 3 = 9.4 %

% Na2 = %

Other Formula = P2 Os Other Formula = La2 3 Young's Modulus = 5.38 EA

1st Technique = Ind. Crk. Len

2nd Technique =

n =

Environment = Heptane

Reference = FREIMAN.S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.2% Nd2 3

Specific Material

Manufacturer = % A12 3 = 9.4 % Na2 =

Other Formula =

Other Formula =

Young's Modulus

1st Technique = Ind. Crk. Len. 2nd Technique =

n =

Environment = Heptane

Reference = FREIMAN,S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.2% Nd2 3

Specific Material

Manufacturer = % A12 3 =18.8

% Na2 =

Other Formula =

Other Formula =

Young's Modulus = 6.48 E4

1st Technique = Ind. Crk. Len. A^c

2nd Technique = K1C n =

Environment = Heptane

Reference = FREIMAN.S.W., Private Communications, 1984

Comments = Compo.- 3rd Other Oxide- 4.2% Nd2 3

%

%

CaO

PbO

= .37

%

%

CaO

PbO

5.68 £4

Kic = .38

= UP83-6955

% B2 3 = % K2 = 9.4 P2O5 Other % = 65.9 La2 3 Other % = 1.7%

%

CaO

PbO

= .55

% MgO = % SiQ2 =

Gamma = .97 Gamma =

% MgO = % SiQ2 =

Gamma = 1.27 Gamma =

% MgO = % SiQ2 =

Gamma = 1.27 Gamma =

% MgO = % SiQ2 =

Gamma = 2.33 Gamma =

17
B2 3 = 8.07 K,0 =

Other % =

Other % =

GUP83

Specific Material = E-Glass

Manufacturer = % A12 3 =13.8 %

% Na2 = 5.44 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. K\C =

2nd Technique = Klc =

n = 24.8 Environment = air Reference = GUPTA, P., Frac. Mech. of Ceram., Vol. 5, 291-303, 1983

Comments = Material is an E-Glass Fiber

% CaO = 17.4 % MgO = 6.66 % PbO = % SiQ2 = 53.8

Gamma

Gamma

B2 3 = K2 =

Other % =

Other % =

KEN74

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 33 % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus = 8.9 EA

1st Technique = DCB Klc = 1.12 2nd Technique = Kxc =

n —

Environment = N2(l) Reference = KENNEDY,C.,BRADT,R.,Frac. Mech. of Cer.,883-93,Vol. 2,1974

Comments =

% MgO = % SiQ2 = 67

Gamma = 7.0 Gamma =

% B2 3 = % K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = %

% Na2 = 29 % K2 = %

Other Formula =

Other Formula =

Young's Modulus = 8.93 E4

1st Technique = DCB K1C 2nd Technique = K1C =

n =

Environment = N2 (l) Reference = KENNEDY,C.,BRADT,R.,Frac. Mech. of Cer.,883-93,Vol. 2,1974

Comments =

CaO =

PbO =

1.04

% MgO = % SiO, = 71

Gamma = 6.0 Gamma =

B2 3 = K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = 25 %

Other Formula =

Other Formula =

Young's Modulus = 9.1 E4

1st Technique = DCB

2nd Technique =

n =

Environment = N2 (l) Reference = KENNEDY) C.,BRADT,R.,Frac.

Comments =

%

%

CaO =

PbO =

= 1.04

Mech. of Cer.,883-93,Vol. 2,1974

% MgO = % SiO, = 75

Gamma = 5.95 Gamma =
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 20 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 9.25 EA

1st Technique = DCB Klc = .98 2nd Technique = ATIC =

n =

Environment = N2 (l) Reference = KENNEDY,C.,BRADT,R.,Frac. Mech. of Cer.,883-93,Vol. 2,1974

Comments =

% MgO - % Si02 = 80

Gamma = 5.2 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 =17 % K2 = % PbO = % Si02

: = 83

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 9.35 EA

1st Technique = DCB Klc = .96 Gamma = 4.95 2nd Technique = ^IC = Gamma

ft == Environment = N2 (l) Reference = KENNEDY,C.,BRADT,R.,Frac. Mech. of Cer ,883-93, Vol. 2,1974

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 100

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 10.1 EA

1st Technique = DCB Klc = .87 Gamma == 3.7 2nd Technique = ^IC = Gamma = n =

Environment = N2 (l) Reference = KENNEDY.C.BRADT^^Frac. Mech. of Cer ,883-93,Vol. 2,1974

Comments =

MEC74

Specific Material = 7940

Manufacturer = Corning Glass

% A12 3 = % B2 3 = % Naz O = % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.21 EA

1st Technique = AMDCB Klc 2nd Technique = Klc =

n =

Environment = air Reference = MECHOLSKY,J.,RICE,R., JACTAW, Vol. 57, No. 10, 1974

Comments =

% CaO = % PbO =

.73

% MgO = % SiQ2 = 100

Gamma = 3.7 Gamma =

19
%

%

CaO =

PbO =

Specific Material = 1723

Manufacturer = Corning Glass

% A12 3 = 9.43 % B2 3 = 4.60 % Na2 = % K2 =

Other Formula = BaO Other % = 2.51 Other Formula = Other % =

Young's Modulus = 8.91 EA

1st Technique = AMDCB

2nd Technique =

n =

Environment = air Reference = MECHOLSKY,J.,RICE,R., JACTAW, Vol. 57, No. 10, 1974

Comments =

= .81

11.4 % MgO = 11.1 % Si02 = 60.8

Gamma = 3.7 Gamma =

% MgO = % SiQ2 = 82.0

Gamma = 4.0 Gamma =

Specific Material = 7740

Manufacturer = Corning Glass

% A12 3 = 3.36 % B2 3 = 11.3 % CaO = % Na2 = 3.26 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.37 EA

1st Technique = AMDCB Klc = .71 2nd Technique = Klc =

n =

Environment = air Reference = MECHOLSKY,J.,RICE,R., JACTAW, Vol. 57, No. 10, 1974

Comments =

Specific Material =

Manufacturer = % A12 3 = .581 % B2 3 = % CaO = 5.28 %

% Na2 = 16.2 % K2 = % PbO = %

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.34 EA

1st Technique = AMDCB Klc = .72 Gamma = 3.5 2nd Technique = Klc = Gamma =

n =

Environment = air Reference = MECHOLSKY,J.,RICE,R„ JACTAW, Vol. 57, No. 10, 1974

Comments =

MgO =

SiQ2 =

5.88

71.9

MEC77

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = % K2 = % PbO =

Other Formula = Li2 Other % = 33 Other Formula = Other % =

Young's Modulus = 5.2 EA

1st Technique = DCB Klc = .7 2nd Technique = K\C =

n —

Environment = air Reference = MECHOLSKY,J„FREIMAN,Proc. of Int. Glass Cong.,479-83, 1977

Comments =

% MgO = % SiQ2 = 67

Gamma = 5.0 Gamma =

20
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 62.5 Other Formula = BaO Other % =37.5

Other Formula = Other % =

Young's Modulus = 6.4 EA

1st Technique = DCB K1C = .5 Gamma = 2.0 2nd Technique = ^IC = Gamma =

ft =

Environment = air Reference = MECHOLSKY,J.,FREIMAN,Proc. of Int. Glass Cong.,479-83, 1977

Comments =

111

Specific Material = ENK5

Manufacturer = Owens-Corning

% A12 3 = 8.55 % B2 3 = 8.17 % CaO = 17.6 % MgO = 6.74 % Na2 = 2.14 % K2 = 2.21 % PbO = % SiO, = 54.4 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = Klc = Gamma =

n = 11 Environment = H2 Reference = METCALFE,AG.,SCHMITZ,G.K.,Glass Tech.,5-16,Vol. 13,No. 1,1972

Comments = Material is an E-Glass Fiber

Specific Material = EF5

Manufacturer = Owens-Corning

% A12 3 = 8.94 % B2 3 = 8.54 % CaO = 18.4 % MgO = 7.04 % Na2 = % K2 = % PbO = % SiG2 = 56.9 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = Kxc = Gamma =

n = 19 Environment = H2 Reference = METCALFE,A.G.,SCHMITZ,G.K.,Glass Tech.,5- 16, Vol. 13,No. 1,1972

Comments = Material is an E-Glass Fiber

Specific Material = EBNO

Manufacturer = Owens-Corning

% A12 3 = 9.83 % B2 3 = % Na2 = % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Kxc = Gamma =

2nd Technique = Klc = Gamma =

n = 30

Environment = H2 Reference = METCALFE,A.G.,SCHMITZ,G.K.,Glass Tech.,5-16,Vol.l3,No. 1,1972

Comments = Material is an E-Glass Fiber

21

% CaO = 21.3 % MgO = 7.37 % PbO = % SiQ2 = 61.4
Specific Material = ES

Manufacturer = Owens-Corning

% A12 3 = 8.89 % B2 3 = 8.53 % CaO = 18.3 % MgO = 6.97 % Na2 = .504 % K2 = % PbO = % Si02 = 56.7 Other Formula = Other % =

Other Formula = Other % —

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = Klc = Gamma =

n = 22

Environment = H2 Reference = METCALFE,A.G.,SCHMITZ,G.K.,Glass Tech., 5- 16, Vol. 13,No. J, 1972

Comments = Material is an E-Glass Fiber

Specific Material = ENO

Manufacturer = Owens-Corning

% A12 3 = 8.88 % B2 3 = 8.52 % CaO = 18.3 % MgO = 6.97 % Na2 = % K2 = % PbO = % Si02 = 57.2 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. K\c = Gamma =

2nd Technique =

n = 22

Environment = H2

K\C = Gamma =

Reference = METCALFE,A.G.,SCHMITZ,G.K.,Glass Tech.,5-16,Vol. 13,No. 1,1972

Comments = Material is an E-Glass Fiber

% CaO = 17.4 % MgO = 6.66 % PbO = % SiQ2 = 53.8

Specific Material = EN5

Manufacturer = Owens-Corning

% A12 3 = 8.45 % B2 3 = 8.07 % Na2 = 5.44 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. 2nd Technique =

n = 20

Environment = H2 Reference = METCALFE,A.G.,SCHMITZ,G.K.,Glass Tech.,5-16,Vol

Comments = Material is an E-Glass Fiber

Specific Material = EK5

Manufacturer = Owens-Corning

6.79

54.8

^IC = Gamma =

ATIC = Gamma =

.,5-16,Vol. 13,No. 1,1972

%, A12 3 = 8.61 % B2 3 = 8.23 % CaO = 17.8 % MgO = % Na2 = % K2 = 3.64 % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. KIC = Gamma =

2nd Technique =

n = 17 Environment = H2

Klc = Gamma =

Reference = METCALFE,A.G.,SCHMITZ,G.K..Glass Tech.,5-16,Vol. 13,No. 1,1972

Comments = Material is an E-Glass Fiber

22
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 100 % CaO = % MgO

% Na2 = % K2 = % PbO = % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. Klc = .89 Gamma

2nd Technique = •K'ic = Gamma

flEnvironment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 98.4 % CaO = % MgO

% Na2 = % K2 = % PbO = 1.5 % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len Klc = .87 Gamma

2nd Technique = A'ic = Gamma

n =

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 96.8 % CaO = % MgO

% Na2 = % K2 = % PbO = 3.13 % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. Kic = -8 Gamma

2nd Technique = ^IC = Gamma

n =

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 95.8 % CaO = % MgO

% Na2 = % K2 = % PbO = 4.16 % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. Klc = .11 Gamma

2nd Technique = NB Klc = .82 Gamma : n =

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

23
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 94.3 % CaO = % MgO

% Na2 = % K2 = % PbO = 5.62 % Si02

= Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. ATIC = .78 Gamma = 2nd Technique = NB Klc = .84 Gamma = n =

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 87.9 % CaO = % MgO

% Na2 = % K2 = % PbO = 12.0 % Si02

= Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. Klc = 163 Gamma = 2nd Technique = NB Kxc =1.59 Gamma

n —

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

% CaO = % MgO

% PbO = 14.0 % SiQ2

=

K\c = 1-39 Gamma

ATIC = 1.38 Gamma

n =

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 85.9 % Na2 = % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. 2nd Technique = NB

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 83.7 % CaO = % MgO

% Na2 = % K2 = % PbO = 16.2 % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. KIC = 1.29 Gamma

2nd Technique = NB Klc = 1.33 Gamma

n —

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments =

24
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 80.7 % CaO = % MgO = % Na2 = % K2 = % PbO = 19.2 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Ind. Crk. Len. Klc = .95 Gamma =

2nd Technique = NB KiC = .91 Gamma =

n =

Environment = air Reference = MIYATA,N.,JINNO,H.,J. of Non-Cryst. Sol. 38 & 39,391-96,1980

Comments = -^

MIY81

Specific Material =

Manufacturer = % Al2 3 = % B2 3 =100 % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 1.73 E4

1st Technique = Ind. Crk. Len. ATiC = .96 Gamma = 26.64

2nd Technique = KK = Gamma =

n =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 98.4 % CaO = % MgO = % Na2 = % K2 = % PbO =1.50 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 1.87 EA

1st Technique = Ind. Crk. Len. KK = .96 Gamma = 24.64

2nd Technique = Af,c = Gamma =

n =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 96.8 % CaO = % MgO = % Na2 = % K2 = % PbO = 3.13 % SiOz =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 2.02 EA

1st Technique = Ind. Crk. Len. KiC = .88 Gamma = 19.17 2nd Technique = Klc = Gamma =

« =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

25
Specific Material =

Manufacturer = % A12 3 = % B2 3 = < % Na2 = % K2 =

Other Formula = Other %

Other Formula = Other %

Young's Modulus >.l EA

1st Technique = Ind. Crk. Len. 2nd Technique = NB

95.8 % CaO = % PbO = 4.16

Klc = .87 Klc = .82

% MgO = % SiQ2 =

Gamma

Gamma

18.02

16.01

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

%

%

B2 3 = 94.3 K2 =

Other % =

Other % =

%

%

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula =

Other Formula =

Young's Modulus = 2.23 EA

1st Technique — Ind. Crk. Len

2nd Technique = NB

n =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

CaO =

PbO = 5.62

= .85

% MgO = % SiQ2 =

Gamma

Gamma

17.36

16.20

B2 3 = K2 =

Other %

Other %

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 87.9 %

% Na2 = % K2 = %

Other Formula =

Other Formula =

Young's Modulus = 3.12 EA

1st Technique = Ind. Crk. Len

2nd Technique = NB

n =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

CaO =

PbO = 12

1.75

1.6

B2 3 = 85.9 K2 =

Other % =

Other % =

Specific Material =

Manufacturer =

%'A12 3 = % B2 3 = 85.9 %

% Na2 = % K2 = %

Other Formula =

Other Formula =

Young's Modulus = 3.62 EA

1st Technique = Ind. Crk. Len. Klc 2nd Technique = NB ATIC n —

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

CaO =

PbO = 14.0

1.52

1.37

% MgO = % SiQ2 =

Gamma = 49.08

Gamma = 41.03

% MgO = % SiQ2 =

Gamma = 31.91 Gamma = 25.92

26
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 83.7 % CaO = % MgO = % Na2 = % K2 = % PbO = 16.2 % SiQ2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 4.45 EA

1st Technique = Ind. Crk. Len. Klc = 1.4 Gamma =

2nd Technique = NE KK = 1.35 Gamma =

Tl =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 80.7 % CaO = % MgO = % Na2 = % K2 = % PbO = 19.2 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.04 EA

1st Technique = Ind. Crk. Len. Klc = 1.05 Gamma =

2nd Technique = NB KK = .93 Gamma =

n =

Environment = air Reference = MIYATA,H.,JINNO,N.,Journ. of Mat. Sci. 16,2205-17,1981

Comments =

22.02

9.13 7.16

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = 5.36 % MgO

% Na2 =14.5 % K2 = % PbO = % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.19 E4

1st Technique = NB KiC = .8 Gamma

2nd Technique = A'ic = Gamma

ft == Environment = air Reference = MIYATA,N.,TANIGAWA,K.,Frac. Mech. of Cer.,Vol. 5,609-23,1983

Comments = Test Tech.- introduced a sharp crack at the notch

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = 5.37 % MgO

% Na2 = 19.4 % K2 = % PbO = % Si02

80.0

= 5.17

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.28 EA

1st Technique = NB KiC = .8 2nd Technique = KK =

n =

Environment = air Reference = MIYATA,N.,TANIGAWA,K.,Frac. Mech. of Cer.,Vol. 5,609-23,1983

Comments = Test Tech.- introduced a sharp crack at the notch

Gamma

Gamma

= 75.1

= 5.10

27
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = 24.3 % K2 =

Other Formula = Other %

Other Formula = Other %

Young's Modulus = 6.37 £4

1st Technique = NB

2nd Technique =

% CaO = 5.37 % PbO =

^ic —

K\c =

% MgO = % SiQ2 = 70.2

Gamma = 5.02 Gamma =

Environment = air Reference = MIYATA,N.,TANIGAWA,K.> Frac. Mech. of Cer., Vol. 5,609-23,1983

Comments = Test Tech.- introduced a sharp crack at the notch

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = 5.38 % Na2 = 29.2 % K2 = % PbO

Other Formula =

Other Formula =

Young's Modulus = 6.42 £4

1st Technique = NB KiC = .8 2nd Technique = K\C =

n =

Environment = air Reference = MIYATA,N.,TANIGAWA,K.,Frac. Mech. of Cer.,Vol. 5,609-23,1983

Comments = Test Tech.- introduced a sharp crack at the notch

B2 3 = K2 =

Other % #

Other % =

%

%

MgO =

SiQ2 = 65.3

Gamma = 4.98 Gamma =

B2 3 = K2 = .632 Other % =

Other % =

MgO =

SiQ2 =

MOU59

Specific Material =

Manufacturer = % A12 3 =1.16 % B2 3 = % CaO = 7.43 %

% Na2 = 13.4 % K2 = .632 % PbO = %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Static Fat. KIC = Gamma =

2nd Technique = ATIC = Gamma =

n = 13 Environment = H2 Reference = MOULD,R.E.,SOUTHWICK,R.D.,JACTAW,42,542-47,582-92, 1959

Comments = Surface condition- abraded

PR067

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = %

% Na2 = % K2 = % PbO = %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Static Fat. ATIC = Gamma =

2nd Technique = KiC = Gamma =

n = 19.2 Environment = air, 50% RH

Reference = PROCTER,B.A.,Proc. Roy. Soc. Lond.,Ser. A,297,534-57,1967

Comments = Surface condition- as-drawn fiber

5.91 71.3

B2 3 = K2 =

Other % =

Other % =

MgO =

SiO, = 100

28
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 100

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. KiC = Gamma =

2nd Technique = ATIC = Gamma =

« = 27

Environment = air, 50% RH

Reference = PROCTER,B.A.,Proc. Roy. Soc. Lond.,Ser. A,297,534-57,1967

Comments = Surface condition- as-drawn fiber

RIT69

Specific Material =

Manufacturer = % A12 3 =1.16 % B2 3 = % CaO = 7.43 % MgO = 5.91 % Na2 = 13.4 % K2 = .632 % PbO = % Si02 = 71.3 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = Klc = Gamma =

n = 13 Environment = air, 50% RH

Reference = RITTER,J.E.,Jr., Jour, of Appl. Phys., 40, 340-44, 1969

Comments = Surface condition- acid etch and abraded

RIT71

Specific Material = 7740

Manufacturer = Corning Glass

% A12 3 =1.21 % B2 3 = 12.4 % CaO = % MgO = % Na2 = 3.99 % K2 = % PbO = % SiQ2 = 82.3 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = Klc = Gamma =

n = 21

A

Environment = air, 100% RH

Reference = RITTER,J.E.,Jr.,SHERBOURNE,C.L.,JACTAW,54,601-05, 1971

Comments = Surface condition- abraded

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 100

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. K\C = Gamma =

2nd Technique = ATIC = Gamma =

n = 37.8 Environment = air, 100% RH

Reference = RITTER,J.E.,Jr.,SHERBOURNE,C.L.,JACTAW,54,601-05,1971

Comments = Surface condition- abrade

29
Specific Material = R6

Manufacturer = Owens-Illinois

% A12 3 = 1.78 % B2 3 = 1.74 % CaO = 5.42 % MgO = 6.03 % Na2 = 14.7 % K2 = .645 % PbO = % Si02 = 68.8 Other Formula = BaO Other % = .793 Other Formula = Other % =

Young's Modulus =

1st Technique = Static Fat. Klc = Gamma =

2nd Technique = Klc = Gamma =

n = 32

Environment = air, 50% RH

Reference = RITTER,J.E.,Jr.,SHERBOURNE,C.L.,JACTAW,54,601-05,1971

Comments = Surface condition- acid etch

Specific Material = 7740

Manufacturer = ' Corning Glass

% A12 3 = 1.21 % B2 3 = 12.4 % Na2 = 3.99 % K2 =

Other Formula = Other % =

Other Formula = Other % =

ic — Gamma =

IC = Gamma =

:h., 14,60-64, 1973

% CaO = % MgO = % PbO = % SiQ2 = 82.3

Young's Modulus =

1st Technique = Dynamic Fat. 2nd Technique =

n = 16 Environment = air, 100% RH

Reference = RITTER,J.E.,Jr.,MANTHURUTHIL,J.,Glass Tech

Comments = Surface condition- abraded

Specific Material = 7740

Manufacturer = Corning Glass

% A12 3 = 1.21 % B2 3 = 12.4 % CaO = % MgO = % Na2 = 3.99 % K2 = % PbO = % Si02 = 82.3 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = Klc = Gamma =

n = 22

Environment = air, 100% RH

Reference = RITTER,J.E.,Jr.,MANTHURUTHIL,J.,Glass Tech., 14,60-64, 1973

Comments = Surface condition- acid polished

% CaO = 5.42 % MgO = 6.03 % PbO = % Si02 = 68.8

.793 Other % =

Young's Modulus =

1st Technique = Dynamic Fat. KiC = Gamma =

2nd Technique = A^c = Gamma =

n = 19.5 Environment = 6N NaOH

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- abraded

30

RIT75

Specific Material = R6

Manufacturer = i Owens-Illinois

% A12 3 =1.78 % B2 3 = 1.74 % Na2 =14.7 % K2 = .645 Other Formula = BaO Other % =

Other Formula = Other % =
Specific Material = R6

Manufacturer = Owens-Illinois

% A12 3 =1.78 % B2 3 = 1.74 % CaO = % Na2 = 14.7 % K2 = .645 % PbO =

Other Formula = BaO Other % = .793 Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. ATIC =

2nd Technique = Kxc =

n = 13 Environment = H2 Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- abraded

Specific Material = R6

Manufacturer = Owens-Illinois

5.42

B2 3 = 1.74 K2 = .645 Other % = .793 Other % =

% A12 3 = 1.78 %

% Na2 = 14.7 %

Other Formula = BaO

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. 2nd Technique =

n = 25.1 Environment = 6N HC1

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P.

Comments = Surface condition- abraded

JACTAW, 58, 265-67, 1975

% MgO

% SiQ2

Gamma

Gamma

6.03 68.8

% CaO = 5.42 % MgO = 6.03 % PbO = % Si02 = 68.8

Gamma

Gamma

Specific Material = R6

Manufacturer = Owens-Illinois

BaO

B2 3 = 1.74 K2 = .645 Other % = .793 Other % =

% A12 3 = 1.78 % B2 3 = 1.74 % CaO = 5.42 % Na2 = 14.7 % K2 = .645 % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. KIC =

2nd Technique = K\C =

n = 19.3 Environment = 6N NaOH

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- acid polished

Specific Material = R6

Manufacturer = Owens-Illinois

% A12 3 = 1.78 % B2 3 = 1.74 % CaO = 5.42 % Na2 = 14.7 % K2 = .645 % PbO =

Other Formula = BaO Other % = .793 Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. ^IC =

2nd Technique = ^IC =

n = 16.9 Environment = H2 Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- acid polished

% MgO

% SiQ2

Gamma

Gamma

6.03 68.8

% MgO

% Si02

Gamma

Gamma

6.03 68.8

31
Specific Material = R6

Manufacturer = Owens-Illinois

B2 3 = 174

K2 = .645 Other % = .793 Other % =

% A12 3 == 1.78 % B2 3 = 1.74 % CaO = 5.42 % Na2 = 14.7 % K2 = .645 % PbO

Other Formula = BaO

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. KK =

2nd Technique = ATIC =

n = 17.8 Environment = 6N HC1

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- acid polished

Specific Material = 7740

Manufacturer = Corning Glass

%

%

B2 3 12.4 K2 = Other % =

Other % =

% CaO = % PbO = % A12 3 =1.21

% Na2 = 3.99 Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. A'ic =

2nd Technique = K1C =

n = 22.6 Environment = 6N NaOH

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- abraded

% MgO

% SiO,

Gamma

Gamma

6.03

68.8

% MgO = % SiQ2 = 82.3

Gamma =

Gamma =

Specific Material = 7740

Manufacturer = Corning Glass

%

%

B2 3 = 12.4 K2 =

Other % =

Other % =

%

%

CaO =

PbO = % A12 3 =1.21

% Na2 = 3.99 Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. Kxc =

2nd Technique = Klc =

n = 35.1 Environment = H2 Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- abraded

% MgO = % SiQ2 = 82.3

Gamma =

Gamma =

Specific Material = 7740

Manufacturer = Corning Glass

B2 3 = K2 =

Other %

Other %

% A12 3 == 1.21 % B2 3 = 12.4 % CaO = % Na2 = 3.99 % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. K\C =

2nd Technique = KIC =

n = 26.9 Environment = 6N HC1

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- abraded

% MgO = % SiQ2 = 82.3

Gamma

Gamma

32
Specific Material = 7740

Manufacturer = Corning Glass

B2 3 = 12.4 K2 =

Other % =

Other % =

% A12 3 =1.21 %

% Na2 = 3.99 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. 2nd Technique =

n = 21.1 Environment = 6N NaOH

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P.,

Comments = Surface condition- acid polished

Specific Material = 7740

Manufacturer = Corning Glass

% CaO = % PbO =

% A12 3 = 1.21 % B2 3 = 12.4 % CaO = % Na2 = 3.99 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. K\c =

2nd Technique = K\c —

n = 39.8 Environment = H2 Reference = RITTER.J.E. Jr.,LAPORTE,R.P. JACTAW, 58, 265-67, 1975

Comments = Surface condition- acid polished

% MgO = % Si02 = 82.3

Klc — Gamma =

K\c — Gamma =

8, 265-67, 1975

% MgO = % Si02 = 82.3

Gamma =

Gamma =

Specific Material = 7740

Manufacturer = Corning Glass

%

%

B2 3 = 12.4 K2 =

Other % =

Other % =

%

%

CaO

PbO

% A12 3 =1.21

% Na2 = 3.99 Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. Klc =

2nd Technique = KiC =

n = 64.9 Environment = 6N HC1

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments = Surface condition- acid polished

Specific Material = 7740

Manufacturer = Corning Glass

% MgO = % SiQ2 = 82.3

Gamma =

Gamma =

% A12 3 =1.21 % B2 3 = 12.4 % CaO = % Na2 = 3.99 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB Kic =

2nd Technique = K\c =

n = 34.1 Environment = H2 Reference = RITTERJ.E. ,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments =

% MgO

% Si02

Gamma

Gamma

= 82.3

33
Specific Material = 7740

Manufacturer = Corning Glass

B2 3 K2 =

Other %

Other %

% A12 3 =1.21 % B2 3 = 12.4 % Na2 = 3.99 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique — DCB

2nd Technique =

n = 22.7 Environment = 6N NaOH

Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW,

Comments =

% CaO = % PbO = % MgO = % Si02 = 82.3

^ic — Gamma = Klc = Gamma =

8, 265-67, 1975

Specific Material = 7740

Manufacturer = Corning Glass

% A12 3 =1.21 % B2 3 = 12.4 % CaO = % MgO = % Na2 = 3.99 % K2 = % PbO = % SiQ2 = 82.3 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ^IC = Gamma =

2nd Technique = K\c = Gamma =

n = 57

Environment = 6N HC[ Reference = RITTER,J.E.,Jr.,LAPORTE,R.P., JACTAW, 58, 265-67, 1975

Comments =

SHI79

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30 % CaO = % MgO = % Na2 = % K2 = % PbO = 70 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 4.33 EA

1st Technique = Controlled Flaw K1C = .32 Gamma = 1.16 2nd Technique = ^IC = Gamma =

ft ^

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30 % CaO = % MgO = % Na2 = % K2 = % PbO = 70 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 4.33 EA

1st Technique = Controlled Flaw ATic = 24 Gamma = .65 2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

34
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30 % CaO = % MgO = % Na2 = % K2 = % PbO = 52.5 % Si02 =

Other Formula = ZnO Other % =17.5

Other Formula = Other % == Young's Modulus = 5.27 EA

1st Technique = Controlled Flaw Klc — .44 Gamma = 1.82 2nd Technique = ATIC = Gamma =

n —

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30 % CaO = % MgO = % Na2 = % K2 = % PbO = 35 % Si02 =

Other Formula = ZnO Other % = 35

Other Formula = Other % =

Young's Modulus = 6.1 EA

1st Technique = Controlled Flaw K1C = .61 Gamma = 3.05 2nd Technique = ^IC = Gamma =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30 % CaO = % MgO = % Na2 = % K2 = % PbO = 35 % Si02 =

Other Formula = ZnO Other % = 35

Other Formula = Other % =

Young's Modulus = 6.1 E4

1st Technique = Controlled Flaw Klc = .38 Gamma = 1.17 2nd Technique = KIC = Gamma =

ft == Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40 % CaO = % MgO = % Na2 = % K2 - % PbO = 60 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.55 EA

1st Technique = Controlled Flaw *ic = -37 Gamma = 1.26 2nd Technique =

M ^IC = Gamma =

flEnvironment = N2(l) at -196C

Reference = SHINKAI.N.,Thesis by author at Penn. State Univ., 1979

Comments =

35
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40 % CaO = % MgO = % Na2 = % K2 = % PbO = 60 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.55 EA

1st Technique = Controlled Flaw KYC = .36 Gamma = 1.17 2nd Technique = K]C = Gamma =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30

% Na2 = % K2 =

Other Formula = ZnO Other % =

Other Formula = Other % =

% CaO = % MgO = % PbO = 52.5 % SiQ2 =

17.5

Young's Modulus = 5.27 EA

1st Technique = Controlled Flaw Klc = .29 Gamma = .78 2nd Technique = Klc = Gamma =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40 % CaO = % MgO = % Na2 = % K2 = % PbO = 45 % Si02 =

Other Formula = ZnO Other % = 1

Other Formula = Other % =

Young's Modulus = 6.98 EA

1st Technique = Controlled Flaw Klc = .48 Gamma = 1.66 2nd Technique = Klc = Gamma =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% CaO = % MgO = % PbO = 45 % SiQ2 =

Klc = .43 Gamma = 1.30 Klc = Gamma =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40

% Na2 = % K2 =

Other Formula = ZnO Other % = 15 Other Formula = Other % =

Young's Modulus = 6.98 EA

1st Technique = Controlled Flaw

2nd Technique =

36
% B2 3 = 40

% K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = ZnO Other % = 3 Other Formula =

Young's Modulus = 7.47 EA

1st Technique = Controlled Flaw Kxc 2nd Technique = Kxc n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ.,

Comments =

% CaO = % PbO = 30

= .61

1979

% MgO

% SiQ2

=

Gamma

Gamma = 2.47

% B2 0, = 40

% K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na.O =

Other Formula = ZnO Other % = 2 Other Formula =

Young's Modulus = 7.47 £4

1st Technique = Controlled Flaw Kxc 2nd Technique = KIC =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% CaO = % PbO = 30

= .56

% MgO

% SiQ2

=

Gamma

Gamma = 2.11

%

%

B2 3 = 40

Ka O =

Other %

Other %

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = ZnO Other % = 45

Other Formula =

Young's Modulus = 7.9 EA

1st Technique = Controlled Flaw Kxc 2nd Technique = ATIC =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% CaO = % PbO =

75

15 % MgO = % SiQ2 =

Gamma = 3.57 Gamma =

B2 3 = 40

K2 =

Other % = 45

Other % =

% CaO = % PbO

Specific Material =

Manufacturer = % A1,03 = %

% Na2 = %

Other Formula = ZnO

Other Formula =

Young's Modulus = 7.9 EA

1st Technique = Controlled Flaw Kxc 2nd Technique = Kxc =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

= 15

= .61

% MgO = % SiQ2 =

Gamma = 2.32 Gamma =

37
Specific Material =

Manufacturer = % A12 3 = % B2 0, = 40 % CaO

% Na2 = % K2 = % PbO

Other Formula = ZnO Other % = 60

Other Formula = Other % =

Young's Modulus = 8.88 E4

1st Technique = Controlled Flaw

2nd Technique =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

= .89

% MgO

% SiQ2

:

Gamma

Gamma = 4.45

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = %

Other Formula = ZnO

Other Formula =

Young's Modulus = 8.88 £4

1st Technique = Controlled Flaw

2nd Technique =

B2 3 = 40

K2 =

Other % = 60

Other % =

% CaO

% PbO

K1C = .80 K\C =

% MgO

% SiQ2

:

Gamma

Gamma

3.64

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % MgO = % Na2 = % K2 = % PbO = 50 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.12 EA

1st Technique = Controlled Flaw K1C = .51 Gamma = 2.13 2nd Technique = ATIC = Gamma =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % MgO = % Na2 = % K2 = % PbO = 50 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.12 E\

1st Technique = Controlled Flaw Klc = .40 Gamma = 1.33 2nd Technique = ^ic — Gamma =

ft ^

Environment = air Reference = SHINKAI.N.,Thesis by author at Penn. State Univ., 1979

Comments =

38
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % Na2 = % K2 = % PbO - 37.5 Other Formula = ZnO Other % = 12.5 Other Formula = Other % =

Young's Modulus = 7.13 EA

1st Technique = Controlled Flaw KiC = .63 2nd Technique = Klc =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % Na2 = % K2 = % PbO = 37.5 Other Formula = ZnO Other % = 12.5 Other Formula = Other % =

Young's Modulus = 7.13 EA

1st Technique = Controlled Flaw KiC = .46 2nd Technique = Kic =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% MgO = % SiQ2 =

Gamma = 2.74

Gamma =

% MgO

% SiQ2

=

Gamma

Gamma

1.48

B2 3 = 50

K2 =

Other % = 25

Other % =

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = %

Other Formula = ZnO

Other Formula =

Young's Modulus = 8.08 E4

1st Technique = Controlled Flaw Kxc 2nd Technique = K\C =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% CaO = % PbO = 25

= .77

% MgO = % SiQ2 =

Gamma = 3.70 Gamma =

B2 3 = 50

K2 =

Other % = 25

Other % =

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = %

Other Formula = ZnO

Other Formula =

Young's Modulus = 8.08 EA

1st Technique = Controlled Flaw

2nd Technique =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% CaO = % PbO = 25

.64

% MgO

% Si02

=

Gamma

Gamma = 2.54

39
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % MgO = % Na2 = % K2 = % PbO = 12.5 % Si02 =

Other Formula = ZnO Other % = 37.5 Other Formula = Other % =

Young's Modulus = 8.26 EA

1st Technique = Controlled Flaw Klc = .89 Gamma = 4.80

2nd Technique = A"IC = Gamma =

n == Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % MgO = % Na2 = % K2 = % PbO - 12.5 % Si02 =

Other Formula = ZnO Other % = 37.5 Other Formula = Other % =

Young's Modulus = 8.26 EA

1st Technique = Controlled Flaw KIC = .71 Gamma = 3.09 2nd Technique = Kic = Gamma =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % MgO = % Na2 = % K2 = % PbO = % SiQ2 =

Other Formula = ZnO Other % = 50

Other Formula = Other % =

Young's Modulus = 9.73 EA

1st Technique = Controlled Flaw Klc = .88 Gamma = 3.98 2nd Technique = Klc = Gamma =

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50 % CaO = % MgO = % Na2 - % K2 = % PbO = % Si02 =

Other Formula = ZnO Other % = 50

Other Formula = Other % =

Young's Modulus = 9.73 EA

1st Technique = Controlled Flaw KIC = .83 Gamma = 3.57 2nd Technique = Kxc — Gamma =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

40
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 60 % CaO = % MgO = % Na2 = % K2 = % PbO = 40 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.37 EA

1st Technique = Controlled Flaw Klc = .80 Gamma = 4.99 2nd Technique = ATic = Gamma =

Environment = N2 (l) at -196C

Reference = SHINKAI,N..Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 60 % CaO = % MgO = % Na2 = % K2 = % PbO = 40 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.37 EA

1st Technique = < Controlled Flaw K1C = .50 Gamma = 1.92 2nd Technique = Kxc = Gamma =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% B2 3 = 60

% K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = ZnO Other % = 1 Other Formula =

Young's Modulus = 8.35 EA

1st Technique = Controlled Flaw Klc 2nd Technique = Klc n =

Environment = N2(l) at -196C

Reference = SHINKAI.N.,Thesis by author at Penn. State Univ.,

Comments =

% CaO = % PbO = 30

.90

1979

% MgO = % SiQ2 =

Gamma = 4.89

Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 60 %

% Na2 = % K2 = %

Other Formula = ZnO Other % = 10 Other Formula = Other % =

Young's Modulus = 8.35 EA

1st Technique = Controlled Flaw Klc =

2nd Technique = Klc =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

CaO =

PbO =

.55

30

% MgO

% SiQ2

=

Gamma

Gamma

1.79

41
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 60

% Na2 = % K2 =

Other Formula = ZnO Other % =

Other Formula = Other % =

Young's Modulus = 8.75 £4

1st Technique = Controlled Flaw

%

%

20

CaO -

PbO = 20

.96 2nd Technique =

n =

Environment = N2(l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% B2 3 = 6

% K2 =

Other % = 20

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = ZnO

Other Formula =

Young's Modulus = 8.75 EA

1st Technique = Controlled Flaw Klc 2nd Technique = A"iC n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ.,

Comments =

% CaO = % PbO = 20

.79

1979

% MgO = % SiQ2 =

Gamma = 5.26 Gamma =

% MgO = % SiQ2 =

Gamma = 3.55 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 60 % CaO

% Na2 = % K2 = % PbO

Other Formula = ZnO Other % = 30

Other Formula = Other % =

Young's Modulus = 8.91 EA

1st Technique = Controlled Flaw

2nd Technique =

« =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

10

Kic = 1.0

% B2 3 = 60

% K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = ZnO Other % = 3 Other Formula =

Young's Modulus = 8.91 EA

1st Technique = Controlled Flaw Klc 2nd Technique = A'ic =

n =

Environment = air Reference = SHINKAI,N..Thesis by author at Penn. State Univ., 1979

Comments =

% CaO = % PbO = 10

= .81

% MgO = % SiQ2 =

Gamma = 5.61 Gamma =

% MgO = % SiQ2 =

Gamma = 3.72 Gamma =

42
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 70 % CaO = % MgO = % Na2 = % K2 = % PbO = 30 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.47 EA

1st Technique = Controlled Flaw Klc = 1.36 Gamma = 16.91 2nd Technique = A'ic = Gamma =

ftEnvironment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 70 % CaO = % MgO = % Na2 = % K2 = % PbO = 30 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.47 EA

1st Technique = Controlled Flaw Klc = .63 Gamma = 3.66 2nd Technique = ^IC = Gamma =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 70 % CaO = % MgO = % Na2 = % K,0 = % PbO = 22.5 % Si02 =

Other Formula = ZnO Other % = 7.5 Other Formula = Other % =

Young's Modulus = 6.4 EA

1st Technique = Controlled Flaw KIC = 1.23 Gamma = 11.82 2nd Technique = Klc = Gamma =

Environment = N2(l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 70 % CaO = % MgO = % Na2 = % K2 = % PbO = 22.5 % Si02 =

Other Formula = ZnO Other % =7.5

Other Formula = Other % =

Young's Modulus = 6.4 EA

1st Technique = Controlled Flaw K1C = .11 Gamma = 4.61 2nd Technique = Klc = Gamma =

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

43
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 70

% Na2 = % K2 =

Other Formula = ZnO Other % =

Other Formula = Other % =

Young's Modulus = 6.97 E4

1st Technique = Controlled Flaw

2nd Technique =

15

% CaO

% PbO

KK = 1.24

K'ic =

= 15

n =

Environment = N2 (l) at -196C

Reference = SHINKAI,N.,Thesis by author at Penn. State Univ.,

Comments =

1979

% MgO = % SiQ2 =

Gamma = 11.03 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 =

' % Na2 = % K2 =

Other Formula = ZnO Other %

Other Formula = Other %

Young's Modulus = 6.97 EA

1st Technique = Controlled Flaw

2nd Technique =

70

15

% CaO = % PbO = 15

Klc = .85

n =

Environment = air Reference = SHINKAI,N.,Thesis by author at Penn. State Univ., 1979

Comments =

% MgO = % Si02 =

Gamma = 5.20 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 33 % K2 = % PbO = % Si02 = 67

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB K\C = Gamma =

2nd Technique = ^ic = Gamma =

n = 21 Environment = D.I. H2 Reference = SIMMONS,C.J., FREIMAN,S.W. JACTAW, 64, 683-86, 1981 Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 33 % K2 = % PbO = % Si02 = 67

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ATic = Gamma =

2nd Technique = K\Q = Gamma =

n = 21 Environment = 1M Cs in D.I. H2 Reference = SIMMONS,C.J., FREIMAN.S.W. JACTAW, 64, 683-86, 1981 Comments =

44
B2 3 = K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = 33 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 30

Environment = 1 M Li in D.I. H2 Reference = SIMMONS,C.J., FREIMAN,S.W.

Comments =

% CaO = % PbO =

JACTAW, 64, 683-86, 1981

B2 3 = K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 33 % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB K}C —

2nd Technique = ATIC =

n = 93

Environment = air, 30% RH

Reference = SIMMONS.C.J., FREIMAN,S.W., JACTAW, 64, 683-86, 1981

Comments =

% MgO = % SiO, = 67

Gamma =

Gamma =

% MgO = % SiQ2 = 67

Gamma =

Gamma =

B2 3 = K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = %

% Na2 = 25 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 19 Environment = D.I. H2 Reference = SIMMONS.C.J., FREIMAN,S.W.

Comments =

% CaO = % PbO =

JACTAW, 64, 683-86, 1981

% MgO = % SiQ2 = 75

Gamma =

Gamma =

B2 3 = K2 =

Other %

Other %

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 25 % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB A'ic =

2nd Technique = Kxc =

n = 19 Environment = 1 M Cs in D.I. Ha O

Reference = SIMMONS.C.J., FREIMAN,S.W., JACTAW, 64, 683-86, 1981

Comments =

% MgO = % SiQ2 = 75

Gamma =

Gamma =

45
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 25 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ^IC =

2nd Technique = ^IC =

n = 11

Environment = 1 M Li in D.I. H2 Reference = SIMMONS,C.J., FREIMAN.S.W. , JACTAW, 64, 683-86, 1981

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 25 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ^IC =

2nd Technique = ^IC =

n = 11

Environment = air, 30% RH

Reference = SIMMONS,C.J., FREIMAN,S.W.: JACTAW, 64, 683-86, 1981

Comments =

Specific Material =

Manufacturer = % A12 3 =1.75 % B2 3 = % CaO = % Na2 = 13.4 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ^IC =

2nd Technique = ^IC =

n = 18.1 Environment = H2 Reference = SIMMONS,C.J., FREIMAN,S.W., JACTAW, 64, 683-86, 1981

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 23 % CaO =

•% Na2 = 7 % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB ^IC =

2nd Technique = Klc =

n = 28.3 Environment = H2 Reference = SIMMONS,C.J., FREIMAN,S.W., JACTAW, 64, 683-86, 1981

Comments =

7.44

% MgO = % SiQ2 = 75

Gamma =

Gamma =

% MgO = % SiQ2 = 75

Gamma =

Gamma =

% MgO

% SiQ2

Gamma

Gamma

5.91 71.4

% MgO = % SiQ2 = 70

Gamma

Gamma

46
Specific Material =

Manufacturer = % A12 3 = %

% Na2 = 7 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 31.1 Environment = air, 50% RH

Reference = SIMMONS,C.J.; Comments

B: 3 = 23

K2 =

Other % =

Other % =

% CaO = % PbO =

FREIMAN.S.W., JACTAW, 64, 683-86, 1981

% MgO = % SiQ2 = 70

Gamma =

Gamma =

% B2 3 = % K2 =

Other % =

Other % =

SME83

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other % = 1 Other Formula =

Young's Modulus = 4.65 E4

1st Technique = NB Klc 2nd Technique = Kic =

n =

Environment = N2(g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

- .61

% MgO = % SiQ2 =

Gamma = 3.8 Gamma =

% B,03 = % K2 =

Other % = 97.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 = 2.5 Other Formula = Ge02 Other Formula =

Young's Modulus = 5.258 EA

1st Technique = NB Kic 2nd Technique = K^c =

n =

Environment = N2(g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .69

9c B2 3 = % K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 = 5 Other Formula = Ge02 Other Formula =

Young's Modulus = 5.84 E4

1st Technique = NB KiC 2nd Technique = Kxc =

n =

Environment = N2 (g)

Reference = SMETS,B.MJ., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .83

% MgO = % SiQ2 =

Gamma = 4.3 Gamma =

% MgO = % SiO, =

Gamma = 5.6 Gamma =

47
% B2 3 -

"c K2 =

Other % = 92.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 = 7.5 Other Formula = Ge02 Other Formula =

Young's Modulus = 6.196 E4

1st Technique = NB A"IC 2nd Technique = ATIC =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .82

% MgO = % SiQ2 =

Gamma = 5.1 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = 10 % K2 =

Other Formula = Ge02 Other % =

Other Formula = Other % =

% CaO = % PbO =

90

Young's Modulus = 6.12 EA

1st Technique = NB Klc = .93 2nd Technique = A'ic =

n —

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% MgO = % SiQ2 =

Gamma = 6.6 Gamma =

%

%

B2 3 = K2 =

Other % = 90.1 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 = 9.9 Other Formula = GeOj

Other Formula =

Young's Modulus = 6.903 EA

1st Technique = NB KK

2nd Technique = A"IC =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

.84

% MgO = % SiQ2 =

Gamma = 4. Gamma =

°/< B2 3 = % K2 =

Other % = 87.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =12.5

Other Formula = Ge02 Other Formula =

Young's Modulus = 6.752 E4

1st Technique = NB A'ic 2nd Technique = A"IC =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

.87

% MgO = % SiQ2 =

Gamma = 5.2 Gamma =

48
% B2 3 = % K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 = 14 Other Formula = GeOz Other % = £ Other Formula =

Young's Modulus = 7.275 EA

1st Technique = NB Klc 2nd Technique = K1C =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .78

%

%

B2 3 = K2 = 2.5 Other % = 97.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 5.238 EA

1st Technique = NB Kxc 2nd Technique = Klc =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .71

% MgO = % SiQ2 =

Gamma = 3.9 Gamma =

% MgO = % SiQ2 =

Gamma = 4.6 Gamma =

% B2 3 = % K2 = 5 Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other % = 9 Other Formula =

Young's Modulus = 5.593 EA

1st Technique = NB A^c

2nd Technique = Kxc =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO - % PbO =

= .86

%

%

B2 3 = K2 = 7.5 Other % = 92.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 5.8 EA

1st Technique = NB KiC 2nd Technique = Kxc =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

.79

% MgO = % SiQ2 =

Gamma = 6.2 Gamma =

% MgO = % SiQ2 =

Gamma = 5.1 Gamma =

49
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 = 10 Other Formula = Ge02 Other % =

Other Formula = Other % =

%

%

CaO =

PbO =

90

Young's Modulus = 6.031 EA

1st Technique = NB Klc = .75 2nd Technique = KiC =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO

% PbO

Specific Material =

Manufacturer = % Al2 Oj = % B2 3 = % Na2 = % K2 = 12.5 Other Formula = Ge02 Other % = 87.5 Other Formula = Other % =

Young's Modulus = 6.13 £4

1st Technique = NB

2nd Technique = Klc = .72 Kic =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% MgO = % SiQ2 =

Gamma = 4.4 Gamma =

% MgO = % SiQ2 =

Gamma = 3.9 Gamma =

%

%

B2 3 = K2 = 15 Other % = 85

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 6.184 E\

1st Technique = NB Kxc 2nd Technique = KiC =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .67

% B2 3 = % K2 = 16.5 Other % = 83.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 6.157 E4

1st Technique = NB KiC 2nd Technique = KIC =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO - % PbO =

= .62

% MgO = % SiQ2 =

Gamma = 3.4 Gamma =

% MgO = % SiQ2 =

Gamma = 2.9 Gamma =

50
%

%

B2 3 = K2 = 17.5 Other % = 82.5 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 6.054 EA

1st Technique = NB KiC 2nd Technique = Klc =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO =

= .62

% MgO = % SiQ2 =

Gamma = 3.0 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 = 20

Other Formula = Ge02 Other % = 80

Other Formula = Other % =

Young's Modulus = 5.781 EA

1st Technique = NB

2nd Technique =

% CaO

% PbO

Klc = .65

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% MgO = % SiQ2 =

Gamma = 3.4 Gamma =

% B2 3 = % K2 =

Other % = 95

Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 4.866 EA

1st Technique = NB ATIC 2nd Technique = ATIC =

n =

Environment = N2 (g)

Reference = SMETS.B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO = 5

= .6

% MgO = % SiQ2 =

Gamma = 3.5 Gamma =

% B2 3 = % K2 =

Other % = 85 Other % =

Specific Material =

Manufacturer = % A12 3 = % Na2 =

Other Formula = Ge02 Other Formula =

Young's Modulus = 5.414 EA

1st Technique = NB ^Tic 2nd Technique = K1C =

n =

Environment = N2 (g)

Reference = SMETS,B.M.J., Private Communications, 1983

Comments = Precracked samples, crosshead speed 4.3 10-6 m/s, dew point 50C

% CaO = % PbO = 15

= .6

% MgO = % SiQ2 =

Gamma = 3.5 Gamma =

51
SWE78

Specific Material =

Manufacturer = % A12 3 = %

9J Na2 = 20.8 %

Other Formula =

Other Formula =

Young's Modulus = 6.8 EA

1st Technique = NB

2nd Technique =

n =

B2 3 - 4.2 K2 =

Other % =

Other % =

% CaO

% PbO

Klc = .84

ATIC =

Environment = air Reference = SWEARENGEN,J.,Fracture Mechanics of Cer.,Vol 4,973-87,1978

Comments =

% MgO = % SiQ2 = 75

Gamma = 5.19 Gamma =

B2 3 = 10 K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 =10 % CaO

% Na2 =15 % K2 = % PbO

Other Formula =

Other Formula =

Young's Modulus = 7.735 EA

1st Technique = NB K1C = .88 2nd Technique = ATIC =

n =

Environment = air Reference = SWEARENGEN,J.,Fracture Mechanics of Cer.,Vol 4,973-87,1978

Comments =

% MgO = % SiO, = 75

Gamma = 5.01 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 14.2 % CaO = % MgO = % Na2 =10.8 % K2 = % PbO = % Si02 = 75 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 8.02 EA

1st Technique = NB Klc = .83 Gamma = 4.30

2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = SWEARENGEN.J.,Fracture Mechanics of Cer..Vol 4,973-87,1978

Comments =

Specific Material =

Manufacturer = % A12 3 = % B2 3 =18.8 % CaO = % MgO = % Na2 = 6.2 % K2 = % PbO = % Si02 = 75 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.89 EA

1st Technique = NB Klc = .83 Gamma = 5.0 2nd Technique = Klc = Gamma =

Environment = air Reference = SWEARENGEN,J.,Fracture Mechanics of Cer .Vol 4,973-87,1978

Comments =

52
% B2 3 - % K2 =

Other % =

Other % =

TAR78

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 100

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique — Dynamic Fat. Kxc = Gamma =

2nd Technique = Kic = Gamma =

n = 29.2 Environment = air, 2% RH

Reference = TARIYAL,B.K., KALISH,D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface condition-plastic-clad fiber (EVA-single coating)

Specific Material =

Manufacturer = % A12 3 = % B2 3 - % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. ATIC = Gamma =

2nd Technique = Klc = Gamma =

n = 21.8 Environment = air, 45% RH

Reference = TARIYAL,B.K., KALISH.D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface condition-plastic-clad fiber (EVA-single coating)

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 100

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. A^c = Gamma =

2nd Technique = KiC = Gamma =

n = 16.2 Environment = air, 71% RH

Reference = TARIYAL,B.K., KALISH,D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface condition-plastic-clad fiber (EVA-single coating)

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % SiO, = 100

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = Dynamic Fat. Klc = Gamma =

2nd Technique = KiC = Gamma =

n = 15.3 Environment = air, 97% RH

Reference = TARIYAL.B.K., KALISH.D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface condition-plastic-clad fiber (EVA-single coating)

53
% B2 3 = % K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = % K2 - % PbO = Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. Kxc =

2nd Technique = Klc =

n = 29.9 Environment = air, 45% RH

Reference = TARIYAL,B.K., KALISH,D., Frac. Mech. of Cer. 3,161-75,1978,

Comments = Surface cond. -plastic-clad fiber(silane and EVA-dual coating)

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. A^c =

2nd Technique = ATIC =

n = 16.8 Environment = air, 97% RH

Reference = TARIYAL,B.K., KALISH,D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface cond. -plastic-clad fiber(silane and EVA-dual coating)

B2 3 = K2 =

Other %

Other %

% MgO = % Si02 = 100

Gamma

Gamma

% MgO = % SiQ2 = 100

Gamma =

Gamma =

B2 3 = K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. KiC =

2nd Technique = KK =

n = 27.6 Environment = air, 45% RH

Reference = TARIYAL,B.K., KALISH,D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface condition-plastic-clad fiber (single coating)

% MgO = % SiQ2 = 100

Gamma =

Gamma =

% B2 3 = % K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = % K2 = % PbO = Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Dynamic Fat. K]C =

2nd Technique = KIC =

n = 25.3 Environment = air, 97% RH

Reference = TARIYAL,B.K., KALISH.D., Frac. Mech. of Cer. 3,161-75,1978

Comments =

% MgO

% SiQ2

Gamma

Gamma

= 100

54
B2 3 = K2 =

Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = Static Fat. Kxc —

2nd Technique = Klc =

n = 14.7 Environment = air, 97% RH

Reference = TARIYAL.B-K., KALISH,D., Frac. Mech. of Cer. 3,161-75,1978

Comments = Surface condition-plastic-clad fiber

% MgO

% SiQ2

Gamma

Gamma

100

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 100 % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.7 E4

1st Technique = NB Klc = 1.45 Gamma = 18.44 2nd Technique = Kic = Gamma =

ft == Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 99 % CaO = % MgO = % Na2 = 1 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.6 EA

1st Technique = NB K1C = 1.4 Gamma = 17.5 2nd Technique = ^IC = Gamma =

ft ==- Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 98 % CaO = % MgO = % Na2 = 2 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 4.9 E4

1st Technique = NB Klc = 1.25 Gamma = 15.94 2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

55
Specific Material =

Manufacturer = % A12 3 = % B2 3 = ! % Na2 = 5 % K2 =

Other Formula = Other %

Other Formula = Other %

Young's Modulus = 4.8 EA

1st Technique = NB

2nd Technique =

95 % CaO

% PbO

K1C = 1.2

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% CaO

% PbO

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 90

% Na2 = 10 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 4.2 EA

1st Technique = NB

2nd Technique = Klc = 1.05

% MgO = % SiQ2 =

Gamma = 15 Gamma =

% MgO = % SiQ2 =

Gamma = 13.13 Gamma =

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 80

% Na2 = 20 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 3.6 EA

1st Technique = NB

2nd Technique =

% CaO

% PbO

^.c = -95 K\c =

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 66 % CaO

% Na2 = 34 % K2 = % PbO : Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 2.8 EA

1st Technique = NB K]C = .65 2nd Technique = Klc = n =

Environment = air Reference = VERNAZ.E., Journal of Non -Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% MgO = % SiQ2 =

Gamma = 12.54 Gamma =

% MgO = % SiQ2 =

Gamma = 7.55 Gamma =

56
Specific Material =

Manufacturer = % A12 3 = %

% Na2 =10 %

Other Formula =

Other Formula =

Young's Modulus = 3.9 EA

1st Technique = DT

2nd Technique =

B2 3 = 90

K2 =

Other % =

Other % =

% CaO

% PbO

K1C = 1.0 Klc =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% MgO = % SiQ2 =

Gamma = 12.82 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 80 % CaO = % MgO = % Na2 = 20 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 3.3 EA

1st Technique = DT Klc = .85 Gamma = 10.95 2nd Technique =

yi — KiC — Gamma =

n —

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 75 % CaO = % MgO = % Na2 = 25 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 3.0 EA

1st Technique = DT *ic = -77 Gamma = 9.88 2nd Technique = ^IC = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 66 % CaO = % MgO = % Na2 = 34 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 2.6 EA

1st Technique = DT *ic = -7 Gamma = 9.42 2nd Technique = K\c = Gamma =

57
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 65 % CaO = % MgO = % Na2 = 35 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 2.2 EA

1st Technique = DT Klc = .57 Gamma = 7.38 2nd Technique = ^ic = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 7.5 % K2 = % PbO = % Si02 = 92.5 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.225 E\

1st Technique = NB KK = 1.1 Gamma = 9.72

2nd Technique = ^IC = Gamma =

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 =12.5 % K2 = % PbO = % Si02 = 87.5 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.2 EA

1st Technique = NB Klc = 1.09 Gamma = 9.58 2nd Technique = ^IC = Gamma =

H =

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO =

'% Na2 = 20 % K2 = % PbO = % Si02 = 80

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.7 E\

1st Technique = NB Klc = .87 Gamma = 6.64 2nd Technique = Klc = Gamma =

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

58
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 30 % K2 = % PbO = % Si02 = 70

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.8 E4

1st Technique = NB Klc = -9 Gamma = 6.98 2nd Technique = ^IC = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37 , 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 38 % K2 = % PbO = % Si02 = 62

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 E4

1st Technique = NB KiC = 1.03 Gamma = 8.84 2nd Technique = ^IC = Gamma =

n := Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 45 % K2 = % PbO = % Si02 = 55 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.775 E4

1st Technique = NB Klc = .9 Gamma = 7.01 2nd Technique = ^IC = Gamma =

ft =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 3"', 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = 24 % Si02 = 76

Other Formula = Other % =

Other Formula = Other % —

Young's Modulus = 13.8 EA

1st Technique = NB KIC = 1.1 Gamma = 4.38 2nd Technique = ^ic — Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37 , 359-65,1980

Comments = Young's Modulus is extrapolated

59
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = % K2 =

Other Formula — Other % =

Other Formula = Other % =

Young's Modulus = 12.8 EA

1st Technique = NB

2nd Technique =

it11 ——

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % Al2 3 = % B2 3 = % Na2 = % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 11.7 EA

1st Technique = NB

2nd Technique =

%

%

CaO =

PbO = 27

Kic = 1.0

% MgO = % SiQ2 = 73

Gamma = 3.91 Gamma =

Solids 37, 359-65,1980

% CaO = % PbO = 40

K1C = .9 Kic =

% MgO = % SiQ2 = 60

Gamma = 3.46 Gamma =

n =

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = 60 % Si02 = 40

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.7 EA

1st Technique = NB Kle = .5 Gamma = 1.62 2nd Technique = Kic = Gamma =

Yl —

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37 , 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer — % A12 3 = % B2 3 = 82 % CaO = % MgO = % Na2 = % K2 = % PbO = 18 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 5.1 EA

1st Technique = NB Kic = 1.15 Gamma = 12.97 2nd Technique = Kic = Gamma =

n =

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37 , 359-65,1980

Comments = Young's Modulus is extrapolated

60
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 72 % CaO = % MgO = % Na2 = % K2 = % PbO = 28 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 4.4 EA

1st Technique = NB Klc = .85 Gamma = 8.21 2nd Technique =

M ^IC = Gamma =

ftEnvironment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 65.5 % CaO = % MgO = % Na2 = % K2 = % PbO = 34.5 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 3.9 £4

1st Technique = NB Klc = .65 Gamma = 5.42 2nd Technique = ^IC = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 - % B2 3 = 50 % CaO = % MgO = % Na2 = % K2 = % PbO =: 50 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 3.15 EA

1st Technique = NB Klc = .38 Gamma = 2.29 2nd Technique =

M ^IC = Gamma =

flEnvironment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40 % CaO = % MgO =. % Na2 = % K2 = % PbO = 60 % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 3.7 EA

1st Technique = NB Klc = .58 Gamma = 4.55 2nd Technique = Klc = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

61
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50

% Na: = % K2 =

Other Formula = ZnO Other % = 50

Other Formula = Other % =

Young's Modulus = 4.0 EA

1st Technique = NB

2nd Technique =

% CaO

% PbO

Kic = -7 Kic —

n =

Environment = air Reference = VERNAZ,E-, Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% MgO = % SiQ2 =

Gamma = 6.13 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 45 % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula = ZnO Other % = 55 Other Formula = Other % =

Young's Modulus = 4.2 EA

1st Technique = NB Klc = .78 Gamma = 7.24

2nd Technique = ^IC = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40 % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula = ZnO Other % = 60

Other Formula = Other % =

Young's Modulus = 4.25 E\

1st Technique = NB Klc = .80 Gamma = 7.44 2nd Technique = K\c = Gamma =

Yl ^

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 =

Other Formula = Ge02 Other % =100

Other Formula = Other % =

Young's Modulus = 2.65 EA

1st Technique = NB Kic = .67 Gamma = 8.47 2nd Technique = K\c — Gamma =

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

62
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = 4 % K2 = % PbO

Other Formula = Ge02 Other % = 96

Other Formula = Other % =

Young's Modulus = 4.2 EA

1st Technique = NB Klc = 1.06 2nd Technique = ^IC =

it =i Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = 9 % K2 = % PbO

Other Formula = Ge02 Other % = 91 Other Formula = Other % =

Young's Modulus = 4.9 EA

1st Technique = NB Klc = 1.27 2nd Technique = A'lc =

Tl =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 10 % K2 = % PbO : Other Formula = Ge02 Other % = 90

Other Formula = Other % =

Young's Modulus = 5.2 EA

1st Technique = NB A'lc = 134

2nd Technique = K\c =

ft := Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % Na2 = 12 % K2 = % PbO = Other Formula = Ge02 Other % = 88

Other Formula = Other % =

Young's Modulus = 4.7 EA

1st Technique = NB Klc = 1.2 2nd Technique = A'lc =

Environment = air Reference = VERNAZ,E-> Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% MgO = % SiQ2 =

Gamma = 13.38 Gamma =

% MgO = % SiQ2 =

Gamma = 16.46 Gamma =

% MgO = % SiQ2 =

Gamma = 17.27 Gamma =

% MgO = % SiQ2 =

Gamma = 15.32 Gamma =

63
Specific Material =

Manufacturer = % A12 3 = % B2 3 = % Na2 = 37 % K2 =

Other Formula = Ge02 Other % = 63

Other Formula = Other % =

Young's Modulus = 2.45 EA

1st Technique = NB

2nd Technique =

% CaO = % MgO = % PbO = % SiQ2 =

Kxc = .58 Gamma = 6.87 A^c = Gamma =

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 0, = 80

% Na2 = 20 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 £4

1st Technique = NB

2nd Technique =

% CaO = % MgO = % PbO = % SiQ2 =

Klc = .93 Gamma = 7.21 Klc = Gamma =

n =

Environment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 70

% Na2 = 20 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 £4

1st Technique = NB

2nd Technique =

n =

% CaO = % MgO = % PbO = % SiQ2 = 10

Kxc = -84 Gamma = 5.i Kic = Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 60

% Na2 = 20 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 EA

1st Technique = NB

2nd Technique =

n =

% CaO = % MgO = % PbO = % SiQ2 = 20

Klc = .83 Gamma = 5.74 Kxc — Gamma =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

64
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 50

% Na2 = 20 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 £4

1st Technique = NB

2nd Technique =

% CaO

% PbO

Klc = 1.0

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% CaO

% PbO

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 40

% Na2 = 20 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 £4

1st Technique = NB

2nd Technique =

*ic = 1.0

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% MgO = % Si02 = 30

Gamma = 8.33 Gamma =

% MgO = % SiQ2 = 40

Gamma = 8.33 Gamma =

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 30 % CaO

% Na2 = 20 % K2 = % PbO

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 E4

1st Technique = NB Klc = 1.1 2nd Technique = ^IC =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = 20 % CaO

% Na2 = 20 % K2 = % PbO : Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 E4

1st Technique = NB Klc = 1.08 2nd Technique = ^IC =

rlEnvironment = air Reference = VERNAZ.E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

% MgO = % SiQ2 = 50

Gamma = 10.08 Gamma =

% MgO = % SiQ2 = 60

Gamma = 9.72 Gamma =

65
Specific Material =

Manufacturer = % A12 3 = % B2 3 = 10 % Na2 = 20 % K2 =

Dther Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 £4

1st Technique = NB

2nd Technique =

% CaO = % MgO = % PbO = % SiQ2 = 70

Klc = .91 Gamma = 6.90 Klc = Gamma =

n —

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

Specific Material =

Manufacturer = % A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 20 % K2 = % PbO = % Si02 = 80

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.0 E4

1st Technique = NB Klc = .86 Gamma = 6.16 2nd Technique = Klc = Gamma =

n =

Environment = air Reference = VERNAZ,E., Journal of Non-Crystal. Solids 37, 359-65,1980

Comments = Young's Modulus is extrapolated

WIE69

Specific Material = 7944

Manufacturer = Corning Glass

% A12 3 = % B2 3 = % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 99.9 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.21 E4

1st Technique = DCB A^c = .79 Gamma = 4.37 2nd Technique = Kxc — Gamma =

n =

Environment = N2 (g)

Reference = WIEDERHORN,S., JACTAW, Vol. 52, No. 2, 99-105, 1969

Comments =

Specific Material = 7900

Manufacturer = Corning Glass

% A12 3 = .594 % B2 3 = 2.61 % CaO = % MgO = % Na2 = % K2 = % PbO = % Si02 = 96.7 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.59 E4

1st Technique = DCB A^c = .72 Gamma = 3.96 2nd Technique = KiC = Gamma =

n =

Environment = N2 (g)

Reference = WIEDERHORN.S., JACTAW, Vol. 52, No. 2, 99-105, 1969

Comments =

66
% CaO = 6.59 % PbO =

Specific Material = 1720

Manufacturer = Corning Glass

% A12 3 = 12.0 % B2 3 = 3.54 % Na2 = .994 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 8.91 EA

1st Technique = DCB Klc = .91 2nd Technique = Klc —

n =

Environment = N2 (g)

Reference = WIEDERHORN,S., JACTAW, Vol. 52, No. 2, 99-105, 1969

Comments =

Specific Material = 7740

Manufacturer = Corning Glass

% A12 3 = 1.21 % B2 3 = 12.4 % Na2 = 3.99 % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.37 EA

1st Technique = DCB KiC 2nd Technique = Klc —

n =

Environment = N2 (g)

Reference = WIEDERHORN,S., JACTAW, Vol. 52, No. 2, 99-105, 1969

Comments =

% CaO = % PbO =

.77

% MgO = 18.3 % SiQ2 = 58.4

Gamma = 4.66

Gamma =

% MgO = % Si02 = 82.3

Gamma = 4,63

Gamma =

Specific Material =

Manufacturer = Corning Glass

% A12 3 = 1.16 % B2 3 = %

% Na2 = 13.4 % K2 = .632 %

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 7.34 E4

1st Technique = DCB Kxc =

2nd Technique = Klc =

n —

Environment = N2 (g)

Reference = WIEDERHORN.S., JACTAW, Vol. 52, No. 2, 99-105, 1969

Comments =

Specific Material = 0041

Manufacturer = Corning Glass

% A12 3 = 2.97 % B2 3 = % CaO = % Na2 = 12.2 % K2 = 1.6 % PbO = Other Formula = Other % =

Other Formula = Other % =

Young's Modulus = 6.53 E4

1st Technique = DCB Klc = .68 2nd Technique = K!C =

n =

Environment = N2(g)

Reference = WIEDERHORN,S., JACTAW, Vol. 52, No. 2, 99-105, 1969

Comments =

CaO = 7.43 PbO =

.75

7.59

% MgO

% SiQ2

5.91 71.3

Gamma

Gamma = 3.86

% MgO = % SiQ2 = 75.6

Gamma = 3.52 Gamma =

67
WIE70

Specific Material = 7944

Manufacturer = Corning Glass

CaO = % MgO =

PbO - % SiQ2 = 99.9

Gamma =

Gamma =

% A12 3 = % B2 3 = %

% Na2 = % K2 = %

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB Kxc —

2nd Technique = K\c =

n = 40.8 Environment = H2 Reference = WIEDERHORN,S.M.,BOLZ,L.,JACTAW,Vol. 53,No

Comments =

^IC = Gamma =

^IC = Gamma =

53,No. 10,543-48,1970

10,543-48,1970

Specific Material = 1720

Manufacturer = Corning Glass

% A12 3 - 12.0 % B2 3 = 3.54 % CaO = 6.59 % MgO = 18.3 % Na2 = .994 % K2 = % PbO = % Si02 = 58.4 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 26.5 Environment = H2 Reference = WIEDERHORN,S.

Comments =

Specific Material =

Manufacturer = Corning Glass

% A12 3 =10.8

% Na2 =13.0

Other Formula = Ti02 Other Formula = As2 3 Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 28.7 Environment = H2 Reference = WIEDERI

Comments =

Specific Material = 7740

Manufacturer = Corning Glass

h = 12.4 % CaO = % MgO =

82.3

% B2 3 = % CaO = .462 % MgO = 5.79 % K2 = 2.33 % PbO = % Si02 = 66.6 Other % = .649 Other % = < .1W%

^IC = Gamma =

^IC = Gamma =

IORN,S.M.,BOLZ,L.,JACTAW,Vol . 53,No. 10,543-48,1970

% A12 3 =1.21 % B2 3 = 12.4 % CaO = % MgO = % Na2 = 3.99 % K2 = % PbO = % Si02 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB K{C = Gamma =

2nd Technique = Kxc = Gamma =

n = 35.5 Environment = H2 Reference = WIEDERHORN,S.M.,BOLZ,L.,JACTAW,Vol. 53,No. 10,543-548,1970

Comments =

68
Specific Material = 0041

Manufacturer = Corning Glass

% A12 3 = 2.97 % B2 3 = % CaO = % MgO

% Na2 = 12.2 % K2 = 1.60 % PbO = 7.59 % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB Klc = Gamma

2nd Technique = Kic = Gamma

n = 25.2 Environment = H2 Reference = WIEDERHORN,S.M.,BOLZ,L.,JACTAW,Vol. 53,No. 10,543-548,1970

Comments =

Specific Material =

Manufacturer = Corning Glass

% A12 3 = 1.16 % B2 3 = % CaO = 7.43 % MgO

% Na2 = 13.4 % K2 = .632 % PbO = % Si02 Other Formula = Other % =

Other Formula = Other % =

= 75.6

5.91 71.3

Young's Modulus =

1st Technique = DCB ATIC =

2nd Technique = Klc =

n = 18.5 Environment = H2 Reference = WIEDERHORN,S.M.,BOLZ,L.,JACTAW,Vol. 53,No. 10,543-548, 1970

Comments =

Gamma

Gamma

B2 3 = K2 = .632 Other % =

Other % =

WIE73

Specific Material =

Manufacturer = % A12 3 = 1.16 %

% Na2 = 13.4 %

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 19.4 Environment = 6N NaOH

Reference = WIEDERHORN.S.M

Comments =

% CaO = 7.43 % MgO = 5.91 % PbO = % SiQ2 = 71.3

JOHNSON.H., JACTAW, 56, 192-97, 1973

Gamma

Gamma

% B2 3 = % K2 = .632 Other % =

Other % =

Specific Material =

Manufacturer = % A12 3 =1.16

% Na2 = 13.4 Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB #ic =

2nd Technique = K\C =

n = 32

Environment = 6N HC1

Reference = WIEDERHORN.S.M., JOHNSON.H., JACTAW, 56, 192-97, 1973

Comments =

% CaO = 7.43 % MgO = 5.91 % PbO = % SiQ2 = 71.3

Gamma

Gamma

69
WIE74

Specific Material = 7940

Manufacturer = Corning Glass

% A12 3 = % B2 3 = % CaO = % Na2 = % K2 = % PbO =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB KIC = -74 2nd Technique = NB KK = .75

ft == Environment = Vacuum

Reference = WIEDERHORN.S., Frac. Mech. of Cer. Vol. 2, 829-40, 1974

Comments =

% MgO = % SiO, = 100

Gamma =

Gamma =

Specific Material = 7900

Manufacturer = Corning Glass

B2 3 = 2.62 K2 =

Other % =

Other % =

% A12 3 = .179 % B2 3 = 2.62 % CaO = % Na2 = % K2 = % PbO =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB KlQ = .7 2nd Technique = NB KIC = .71 n —

Environment = Vacuum

Reference = WIEDERHORN,S., Frac. Mech. of Cer., Vol. 2, 829-40, 1974

Comments =

% MgO = % SiQ2 = 97.1

Gamma =

Gamma =

Specific Material = 7913

Manufacturer = Corning Glass

% A12 3 = .297 % B2 3 = 2.61 % Na2 = % K2 =

Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB

2nd Technique =

% CaO

% PbO

*ic = -72

n =

Environment = Vacuum

Reference = WIEDERHORN,S., Frac. Mech. of Cer., Vol. 2, 829-40, 1974

Comments =

% MgO = % SiQ2 = 97.0

Gamma =

Gamma =

Specific Material = 1723

Manufacturer = Corning Glass

9.43 %

%

B2 3 = 4.60 K2 =

Other % =

Other % =

%

%

CaO =

PbO = % A12 3 = % Na2 =

Other Formula = BaO Other % =2.51

Other Formula =

Young's Modulus =

1st Technique = DCB Klc = .85 2nd Technique = NB Klc = .84 n =

Environment = Vacuum

Reference = WIEDERHORN.S., Frac. Mech. of Cer., Vol. 2, 829-40, 1974

Comments =

11.4 % MgO

% SiQ2

Gamma

Gamma

11.1 60.8

70
Specific Material = 7740

Manufacturer = Corning Glass

% A12 3 = 1.21 % B2 3 = 11.5 % CaO = % MgO = % Na2 = 3.98 % K2 = % PbO = % Si02 = 83.2 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB Kxc — .76 Gamma =

2nd Technique = NB Klc = .78 Gamma =

n =

Environment = Vacuum

Reference = WIEDERHORN.S., Frac. Mech. of Cer., Vol. 2, 829-40, 1974

Comments =

Specific Material = BK-7

Manufacturer = Schott

% A12 3 = % B2 3 = 10.0 % CaO = .227 % MgO = % Na2 = 10.3 % K2 = 4.74 % PbO = % SiQ2 = 73.3 % B2 3 = 10.0 % K2 = 4.74

BaO Other % = .833 CeO Other % = < .1W%

% B2 3 = 10.0 % K2 = 4.71 Other % = 828

Other % =

Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB Klc = .86 Gamma =

2nd Technique = NB ATIC = .84 Gamma =

n =

Environment = Vacuum

Reference = WIEDERHORN,S., Frac. Mech. of Cer., Vol. 2, 829-40, 1974

Comments =

Specific Material = UBK-7

Manufacturer = Schott

% A12 3 = % B2 3 = 10.0 % CaO = .226 % MgO = % Na2 = 10.2 % K2 = 4.71 % PbO = % Si02 =

Other Formula = BaO

Other Formula =

Young's Modulus =

1st Technique = DCB KIC = .89 Gamma =

2nd Technique = NB Kxc = .90 Gamma =

n =

Environment = Vacuum

Reference = WIEDERHORN.S., Frac. Mech. of Cer., Vol. 2, 829-40, 1974

Comments =

Specific Material = SF-1

Manufacturer = Schott

% A12 3 = % B2 3 = % CaO = % MgO = % Na2 = 7.15 % K2 = % PbO = 28.2 % Si02 = 64.5 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB Klc = .62 Gamma =

2nd Technique = NB Klc = .64 Gamma =

n =

Environment = Vacuum

Reference = WIEDERHORN,S., Frac. Mech. of Cer., Vol. 2, 829-40,1974

Comments =

71
Specific Material = 7900

Manufacturer = Corning Glass

% A12 3 = .179 % B2 3 = 2.62 % CaO = % MgO

% Na2 = % K2 = % PbO = % Si02 Other Formula = Other % =

Other Formula = Other % =

Young's Modulus =

1st Technique = DCB Kic = Gamma

2nd Technique = ^IC = Gamma

n = 50.5 Environment = air, 100% RH

Reference = WIEDERHORN,S.,EVANS,A.,Frac. Mech. of Cer. 2,829-41,1974

Comments =

Specific Material = 1723

Manufacturer = Corning Glass

%

%

B2 3 4.60

K2 =

Other % =2.51

Other % =

%

%

CaO =

PbO = % A12 3 = 9.43 11.4 % Na2 =

Other Formula = BaO

Other Formula =

Young's Modulus =

1st Technique = DCB

2nd Technique =

n = 46

Environment = air, 100% RH

Reference = WIEDERHORN,S.,EVANS,A.,Frac. Mech. of Cer. 2,829-41,1974

Comments =

= 97.1

% MgO

% SiQ2

Gamma

Gamma

11.1 60.8

B2 3 = K2 =

Other % =

Other % =

Specific Material = SF-1

Manufacturer = Schott

% A12 3 = % B2 3 = % CaO

% Na2 = 7.15 % K2 = % PbO = Other Formula =

Other Formula =

Young's Modulus =

1st Technique = DCB Klc =

2nd Technique = Klc =

n = 38

Environment = air, 100% RH

Reference = WIEDERHORN,S.,EVANS,A.,Frac. Mech. of Cer. 2,829-41,1974

Comments =

% MgO = % SiQ2 = 64.5

Gamma =

Gamma =

Specific Material = NBP-3

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = BaO Other % = 20

Other Formula = P2 5 Other % = 50

Young's Modulus =

1st Technique = Short bar

2nd Technique =

% CaO

% PbO

K1C = .47 Klc =

% MgO = % SiQ2 =

Gamma =

Gamma =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments =

72
B2 3 = K2 =

Other % = 25

Other % = 50

Specific Material = NBP-4

Manufacturer = % A12 3 = %

% Na2 = 25 %

Other Formula = BaO

Other Formula = P2 5 Young's Modulus = 4.3 E4

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications,

Comments = Poisson's Ratio = .2929

1983

% CaO

% PbO

Kic = .52

% MgO

% SiO, :

Gamma

Gamma = 3.14

B2 3 = K2 =

Other % = 30

Other % = 50

Specific Material = NBP-5

Manufacturer = % A12 3 = %

% Na2 = 20 %

Other Formula = BaO

Other Formula = P2 Os Young's Modulus = 4.4 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2930

% CaO

% PbO

Klc = .50

% MgO

% SiQ2

:

Gamma

Gamma = 2.80

Specific Material = NBP-6

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 =15 % K2 = % PbO

Other Formula = BaO Other % = 35

Other Formula = P2 Os Other % = 50

Young's Modulus = 4.5 E4

1st Technique = Short bar ^IC = .52 2nd Technique = ^IC =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2958

% MgO

% SiQ2

=

Gamma

Gamma = 3.03

B2 3 = K2 =

Other % = 40

Other % = 50

Specific Material = NBP-7

Manufacturer = % A12 3 = %

% Na2 =10 %

Other Formula = BaO

Other Formula = P2 5 Young's Modulus = 4.5 E4

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2975

% CaO

% PbO

Klc = .51

% MgO = % SiQ2 =

Gamma = 2.89 Gamma =

73
Specific Material = NBP-10

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = BaO Other % = 16 Other Formula = P2 Os Other % = 50

Young's Modulus = 4.3 EA

1st Technique = Short bar

2nd Technique =

% CaO

% PbO

KIC = .47

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = 3rd Other Oxide- 4% ZnO, Poisson's Ratio = .2890

Specific Material = NBP-11

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = BaO Other % = 12 Other Formula = P2 5 Other % = 50

Young's Modulus = 4.4 EA

1st Technique = Short bar

2nd Technique =

% CaO

% PbO

K1C = Al

K\c =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = 3rd Other Oxide- 8% ZnO, Poisson's Ratio = .2867

% MgO = % SiQ2 =

Gamma = 2.56 Gamma =

% MgO = % SiQ2 =

Gamma = 2.48 Gamma =

Specific Material = NBP-13

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = 30 % K2 = % PbO

Other Formula = BaO Other % = 8 Other Formula = P2 5 Other % = 50

Young's Modulus = 4.4 EA

1st Technique = Short bar ^IC = .48 2nd Technique = ^IC =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = 3rd Other Oxide- 12% ZnO, Poisson's Ratio = .2839

B2 3 = K2 =

Other % = A Other % = 50

Specific Material = NBP-14

Manufacturer = % A12 3 = %

% Na2 = 30 %

Other Formula = BaO

Other Formula = P2 5 Young's Modulus = 4.4 EA

1st Technique = Short bar Kxc 2nd Technique = KK - n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = 3rd Other Oxide- 16% ZnO, Poisson's Ratio = .2815

%

%

CaO

PbO

% MgO = % SiQ2 =

Gamma = 2.61 Gamma =

= .47

% MgO = % SiQ2 =

Gamma = 2.48 Gamma =

74
Specific Material = NZP-1

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = ZnO Other % = 20

Other Formula = P2 Os Other % = 50

Young's Modulus = 4.4 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2803

Specific Material = NBP-20

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = BaO Other % = 16 Other Formula = P2 Os Other % = 50

Young's Modulus = 4.3 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2886

% CaO

% PbO

Klc = .48

% CaO = 4

% PbO =

Klc = .52

% MgO = % SiQ2 =

Gamma = 2.63 Gamma =

% MgO = % SiQ2 =

Gamma = 3.18 Gamma =

Specific Material = NBP-21

Manufacturer = % A12 3 = % B2 3 = % CaO

% Na2 = 30 % K2 = % PbO

Other Formula = BaO Other % = 12 Other Formula = P2Os Other % = 50

Young's Modulus = 4.4 EA

1st Technique = Short bar ^IC = .54 2nd Technique = ^IC =

IIEnvironment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2855

B2 3 = K2 =

Other % = 8 Other % = 50

Specific Material = NBP-23

Manufacturer = % A12 3 = %

% Na2 = 30 %

Other Formula = BaO

Other Formula = P2 5 Young's Modulus = 4.5 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2829

% MgO = % Si02 =

Gamma = 3.29 Gamma =

% CaO

% PbO

Klc = .52

= 12 % MgO

% SiQ2

:

Gamma

Gamma = 3.04

75
Specific Material = NBP-24

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = BaO Other % = 4

Other Formula = P2 5 Other % = 50

Young's Modulus = 4.6 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio= .2801

Specific Material = NCP-6

Manufacturer = % A12 3 = % Na2 = 30

Other Formula = P2 Os Other % = f Other Formula =

Young's Modulus = 4.7 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2757

% B2 3 = % K2 =

Other % =

Other % =

% CaO

% PbO = 16

.53

% CaO = 20

% PbO =

Klc = .46 Klc =

% MgO = % SiQ2 =

Gamma = 3.01 Gamma =

% MgO = % SiQ2 =

Gamma = 2.23 Gamma =

B2 3 = K2 =

Other % = 4

Other % = 50

Specific Material = NCP-9

Manufacturer = % A12 3 = %

% Naz O = 30 %

Other Formula = ZnO

Other Formula = P2 5 Young's Modulus = 4.6 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2768

Specific Material = NCP-10

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = ZnO Other % = 8 Other Formula = P2 5 Other % = 50

Young's Modulus = 4.6 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2768

% CaO

% PbO

Klc = .46

A'jc =

= 16

% CaO

% PbO

*ic = -45 K[C =

12

% MgO = % SiQ2 =

Gamma = 2.27 Gamma ==

% MgO = % SiQ2 =

Gamma = 2.1! Gamma =

76
Specific Material = NCP-12

Manufacturer = % A12 3 = % B2 3 = % Na2 = 30 % K2 =

Other Formula = ZnO Other % = 16 Other Formula = P2 Os Other % - 50

Young's Modulus = 4.5 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2788

Specific Material = NBP-l Manufacturer = % A12 3 = % B2 3 = % Na2 = 40 % K2 =

Other Formula = BaO Other % = 10 Other Formula = P2 Os Other % = 50

Young's Modulus = 4.0 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2909

% CaO = 4

% PbO =

Kic = -46

% MgO = % SiQ2 =

Gamma = 2.35

% CaO

% PbO

Klc = .44

% MgO = % SiQ2 =

Gamma = 2.39 Gamma =

B2 3 - K2 =

Other % = 15 Other % = 50

Specific Material = NBP-2

Manufacturer = % A12 3 = %

% Na2 = 35 %

Other Formula = BaO

Other Formula = P2 5 Young's Modulus = 4.1 EA

1st Technique = Short bar

2nd Technique =

n =

Environment = air Reference = WILDER, J., Private Communications, 1983

Comments = Poisson's Ratio = .2916

% CaO

% PbO

KIC = .46

% MgO

% SiQ2

=

Gamma = 2.60

Gamma =

77
Table 4. Compositions of silicate base glasses

SiQ2 Al.O, B,0, CaO K,0 MgO Na2 PbO Other Ref.

100

100

100 100

100 100

99.9

99.9

97.1 97.1 97.0

96.7

92.5

87.5 83.2 83

82.3 82.3

82.3

82.3

82.3 82.0

80.0 80

80

80

76

75.6

75.6

75.1 7575

75

75

7575

75

73.9

73.3 73.0 73

71.9

71.9

71.4

71.3

71.3 71.3

71.3

71.3

71.3

71.3

71.2

7170.2 70

70

70

70

68.8

68.8 67

67

67

67

.179

.179 .297 .594

1.21

1.21

1.21 1.21

1.21 1.21 3.36

2.97 2.97

18.8

1.76

.581

1.75 1.16

1.16 1.16

1.16 1.16

1.16

1.16 5.72

10

1.78

1.78

2.62 2.62

2.61 2.61

11.5

12.4

12.4

12.4 12.4

12.4

11.3

18.8

14.2 10

4.2

10.0

10.0 8.08

7.45

23

10

1.74

1.74

5.36

5.37

5.37

5.42

5.42

1.60

1.60

.226 4.71 .227 4.74

5.35

5.28 7.44

7.43 .632

7.43 .632 7.43 .632

7.43 .632 7.43 .632

7.43 .632

7.43 .632

2.31 3.44

.645

.645

7.5 12.5 3.98

173.99

3.99

3.99

3.99

3.99

3.26

14.5 20

2020

12.2 12.2

19.4 25

6.2

10.8 15 20.8 2520

10.2

10.3

4.46 16.4 5.88 16.2

5.91 13.4

5.91 13.4

5.91 13.4

5.91 13.4

5.91 13.4

5.91 13.4

5.91 13.4

5.91 13.4

9.41 29

24.3

7 20

3020

6.03 14.7 6.03 14.7

33

33

24

7.59 7.59

.828 <1.0 W %

27

<1.0 W %

.793 .793 33

33

MEC74

KEN74

WIE74/1

PR067

TAR78

RIT71 WIE69

WIE70

WIE74/2

WIE74/1

WIE74/1

WIE69

VER80

VER80

WIE74/1

KEN74

WIE69

RIT75

RIT73

RIT71 WIE70

MEC74

MIY83

VER80

KEN74

EAG78

VER80

WIE69

WIE70

MIY83

KEN74

SWE78

SWE78

SWE78

SWE78

SIM81

EAG78

WIE74/1

WIE74/1

FRE83/1

VER80

CHA58

MEC74

SIM81

WIE69

BRU77

MOU59

RIT69

WIE73

WIE70

FRE83/1

FRE83/1

KEN74

MIY83

SIM81

VER80

VER80

EAG78

RIT75

RIT71 MEC77

KEN74

SIM81

FRE83/2

78
Table 4. Compositions of silicate base glasses —Continued

SiO, A12 Q3 B2 3 CaO K,0 MgO Na,0 PbO Other Ref.

66.6 10.8 65.3

64.5

64.5

62.5 62

61.4 9.83 60.8 9.43 60.8 9.43 60.8 9.43 60

60

6060

60

60

60

60 22.8 60 20

60 13.3 60 8 60 20 60 22.8 60 20

60 16.2 60 8 60

58.4 12.0 58.4 12.0 57.2 8.88

56.9 8.94

56.7 8.89 56 24

55

54.8 8.61 54.4 8.55

53.8 8.45 50

4.60 4.60

4.60 20

22.8 20

16.2

8

3.54

3.54

8.52 8.54

8.53

8.23 8.17

8.07 30

.462

5.38

21.3

11.4

11.4 11.4

2.33

17.2 20

26.7 32

6.59

6.59

18.3 18.4

18.3

17.8

17.6

17.4

3.64

2.21

5.79 13.0 29.2 <1.0 W % WIE70

MIY83

7.15 28.2 WIE74/1

7.15 28.2

37.5 WIE74/2

MEC77

38 VER80

7.37 MET72

11.1 2.51 MEC74

11.1 2.51 WIE74/1

11.1 20

17.2 20

23.8 3240

20

17.2 20

23.8 3240

40

2.51 WIE74/2

VER80

VER80

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

EAG78

18.3 .994 WIE69

18.3 .994 WIE70

6.97 MET72

7.04 MET72

6.97 .504 20

45

MET72

EAG78

VER80

6.79 MET72

6.74 2.14 MET72

6.66 5.44 20 MET72

VER80

79
Table 5. Compositions of borate base glasses

B2Oj A1: 0., CaO K2 MgO Na; PbO Si02 Other Ref.

100

100

100 99 1 98.4 1.5 98.4 1.5 98 2 96.8 3.13 96.8 3.13 95.8 4.16

95.8 4.16 95 5 94.3 5.62 94.3 5.62 90 10 87.9 12.0 87.9 12.0 85.9 14.0 85.9 14.0 83.7 16.2 83.7 16.2 82 18 80.7 19.2 80.7 19.2 80 20

75 25 72 28 70 20 10 70 15 70 22.5 70 30

66 34

65.5 34.5 65 35 60 20 20 60 10 60 20 60 30 60 40

50 20 30

50

50 50

50

50 12.5 50 25 50 37.5 50 50 4540 20 40

40

40

' 60 40

40 15 40 30 40 45 40 60

30 35 30 52.5 30 70

VER80

MIY80

MIY81

VER80

MIY80

MIY81

VER80

MIY80

MIY81

MIY80

MIY81

VER80

MIY80

MIY81

VER80

MIY80

MIY81

MIY80

MIY81

MIY80

MIY81

VER80

MIY80

MIY81

VER80

VER80

VER80

VER80

15 SHI79

7.5 SHI79

SHI79

VER80

VER80

VER80

VER80

30 SHI79

20 SHI79

10 SHI79

SHI79

VER80

50 VER80

VER80

50 SHI79

37.5 SHI79

25 SHI79

12.5 SHI79

SHI79

55 VER80

VER80

60 VER80

VER80

60 SHI79

45 SHI79

30 SHI79

15 SHI79

SHI79

35 SHI79

17.5 SHI79

SHI79

80
Table 6. Compositions ofphosphate base glasses

P2 5 A12 3 BaO CaO K2 La2 3 MgO Na2 Other Ref.

9.4 1.6 25

14.1 1.6 20

15 9.4 1.7 18.8 1.7 12.5 1.7 12 12

15.9 1.4 25

23.6 1.5 28.3 1.5 8

8 12

1220

10

12

12 8 1516

16 4

75.3 9.4 74.6

74.6 25

74.6 25

70.6 9.4 70

69 15 65.9 18.8 65.9 9.4

65.1 16.5 65

62.7 15.9 62

59 11.8 56.7 9.4 50

5050

50

50

50

50

50

50

50

50

50

50

50

50

50

50

50

5050

50

50

5050

50

5050

4 20

2530

354

4 1616 40

50

50

50

4.3 FRE84

0.5 FRE84

0.5 FRE84

0.4 FRE84

4.2 FRE84

10 FRE84

2 FRE84

4.2 FRE84

4.2 FRE84

4.2 FRE84

12 FRE84

4.1 FRE84

13 FRE84

4.1 FRE84

4.0 FRE84

30 12 WIL83

30 WIL83

30 8 WIL83

30 WIL83

40 WIL83

30 8 WIL83

30 WIL83

35 WIL83

30 4 WIL83

30 WIL83

30 16 WIL83

30 WIL83

30 20 WIL83

25 WIL83

20 WIL83

15 WIL83

30 16 WIL83

30 WIL83

30 4 WIL83

10 WIL83

50 ASH82

ASH82

50 ASH82

50 ASH82

ASH82

ASH82

50 ASH82

81
Table 7. Compositions ofgermanate base glasses

GeO: K2 Na2 PbO Ref.

100 VER80

100 SME83

97.5 2.5 SME83

97.5 2.5 SME83

96 4 VER80

95 5 SME83

95 5 SME83

95 5 SME83

92.5 7.5 SME83

92.5 7.5 SME83

91 9 VER80

90.1 9.9 SME83

90 10 SME83

90 10 SME83

90 10 VER80

88 12 VER80

87.5 12.5 SME83

87.5 12.5 SME83

86 14 SME83

85 15 SME83

85 15 SME83

83.5 16.5 SME83

82.5 17.5 SME83

80 20 SME83

63 37 VER80

82
5. Discussion of Results

One of the primary decisions in collecting this data was what tests represented valid measurements of Klc or y. Generally almost all published data, regardless of the test procedure, was included. It must be noted,

however, that the there will not necessarily be a correspondence in KIC (or y) values between different

techniques. K1C is at present an experimentally defined parameter, and historically has been taken as the stress intensity value at which a crack is moving at some rapid, though not precisely defined, rate. It can be expected

that in all of these oxide glasses, cracks will grow at K/s below Klc because of the interaction of water with

the crack tip bonds under stress in the test environment. KiC is actually just one point on a V-Kx curve. For this reason, the measured value of KiC will be sensitive to loading rate, test environments, and the crack length

dependence of Kx in the test specimen. Given these considerations, it is understandable why there is a large

scatter in the Klc and y data for similar glass compositions. In addition, data obtained by the notched beam

technique in which the specimens were not precracked is questionable. Experience has shown that the fracture

toughness data for glasses obtained in this way will lie at K\ or y values higher than would be obtained if a crack

had been present. Nevertheless, we have included data obtained in this way because it did provide trends

otherwise unobtainable.

Despite the problems associated with the wide variability in the fracture toughness data, it is still useful

to consider the correlations that having this large body of data makes possible. As noted earlier, A'ic or y can

be plotted as a function of the mole percent of a particular oxide for a given family of glass or as a function of

Young's modulus. The examples presented indicate a number of interesting observations.

Figure 1 shows a plot of KiC as a function of the mole percent Na2 in all glasses containing both Na2 and Si02 ; other constituents are present in most of these glasses in smaller quantities. It can be seen that there

is no dependence of A^c on Na2 content. Using this same data set, but plotting y versus Young's modulus

(fig. 2) provides an entirely different picture. Here we see that there is a distinct minimum in y at an E s 72

GPa. If we plot ATIC (= 2Ey) versus E (fig. 3), we see that there is a trend to increasing Klc with increasing

Young's modulus. This latter trend might be expected if Young's modulus is considered to be in part a measure

of the strength as well as the stiffness of the Si-O bond in silicate glasses.

Figure 4 shows a trend of Kxc for A12 3 -P2 5 glasses as a function of Young's modulus similar to that seen

in the Na2 0-Si02 series. The plot of K1C versus the mole % P2 5 (fig. 5) indicates that KIC rises with an increase

in the amount of glass former.

Figure 6 shows a plot in which Kxc increases with the mole % of B2 3 for all B2 3 glasses. However, one

must be cautious in analyzing this data since many of the investigators reporting this data discuss the fact that phase separation was observed in their glass systems especially at high B2 3 contents. The existence of two

phases in the glass will likely contribute to increases in Kxc above those for single phase glasses. These

microstructural effects may, in fact, explain the relatively large values of Klc observed in figure 7 at low values

of Young's modulus.

83
1.80

1.60

1.40 -

<n 1.20

1.00'

-. :

.

0.00

5 10 15 20 25 30 35 40 45

MOLE % Na2

Figure 1. Criticalfracture toughness. KIO plotted as a function of the mole % Na£)for all glasses containing both Na2 and SiO* The line

is the best fit curve to a quadratic equation for Kic in terms of the mole % Na^O.

I i/ I I I I I I 9 — •

•

—

8

"~ ~ 7 %\» • - E

•

*^ •\ 3 e

"TM" • \

• t

~" X • • >

5

9 \

•

• / •

cc

HI 4 • •

"" z •

LU

LU 3 •••

•

•• • •

-

QC • D

1- 2 — O

<

& 1 LL

I I I I I I i i I 50 55 60 65 70 75 80 85 90 95

Figure 2. The same data as in figure 1, plotted as y versus the Young's modulus of each glass. The curve is the best fit to a quadratic equation for y in terms of Young 's modulus.

84
0.00

15 30 45 60 75 90 105 120 135

YOUNG'S MODULUS (GPa)

Figure 3. The same data as in figures 1 and 2, plotted as Klc asfunction of Youngs modulus. The curve is the best fit to a quadratic equation for Kic in terms of Young's modulus.

CM

CO 0.

0.25

40 45 50 55 60 65 70 75 80

YOUNG'S MODULUS (GPa)

Figure 4. Kic plotted versus the Young's modulus o/AhOj-PiOs glasses.

85

85
0.90

1

0.80

0.70 —

C\J

•

0.60

0.50

CO 0_

0.40

o

V

0.30 —

0.20 —

0.10

0.00 1. L J L

50 53 56 59 62 65 68 71

MOLE % P2 5

74 77

Figure 5. The same data shown in figure 4 plotted as Kic versus the mole % P2 s

1.80

! I ' 1 1 1 1 1 1

• —

1.60

•

•

/-N 1.40

•

•

•

•

I— 1.20 —

•

• —

E • •

• •

• 1.00 — • • • —

i

<fl m. • -. • • ••

o_ • •

W •

• • • • • •# ^^-' 0.80 -% • •

• • • t • •

•

• ••

• • o • • • • *

0.60 — • •

•

•

•

•

•

3

••

•

•

• —

0.40 — •

• •• —

• t

0.20

I I

•

1 1 1 1 1 1 10 20 30 40 50 60 70 80 90

MOLE % B2 3

Figure 6. K|C plotted against the mole % B^Ojfor all B2OJ containing glasses.

86
CM

CCJ Ql

O

1.80

1.60

1.40

1.20

1.00

0.80 r

s£ 0.60

0.40 —

0.20

0.00

• •

••

• • •• \ t •

J L 10 20 30 40 50 60 70 80 90

YOUNG'S MODULUS (GPa)

Figure 7. The same data as in figure 6 plotted as KiC versus the Young's modulus of the glasses.

6. Summary

This paper presents details of a computerized data base of experimentally determined fracture mechanics

parameters for oxide glasses. The philosophy behind the format of the system is described. The utility of this system in enabling a designer to choose a glass composition or for understanding fracture behavior is demonstrated through the presentation of plots of KK or y as a function of glass composition or elastic modulus.

Finally, the system is capable of providing plots of n versus composition or Young's modulus. However,

the values of n are quite sensitive to test environment as well, so this variable must be accounted for in any

analysis.

87
FORM NBS-1 14A (REV.ll-84)

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET (See instructions,)

1. PUBLICATION OR

REPORT NO.

NBS/TN-1212

2. Performing Organ. Report No. 3. Publication Date

June 1985

4. TITLE AND SUBTITLE

A Computerized Fracture Mechanics Database for Oxide Glasses

5. AUTHOR(S)

S. W. Freiman, T. L. Baker, and J. B. Wachtman, Jr.

6. PERFORMING ORGANIZATION (If joint or other than NBS. see instructions)

NATIONAL BUREAU OF STANDARDS

U.S. DEPARTMENT OF COMMERCE

GAITHERSBURG, MD 20899

7. Contract/Grant No.

8. Type of Report & Period Covered

Final

9. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street, City. State, ZIP)

Same as 6

.

10. SUPPLEMENTARY NOTES

"2 Document describes a computer program; SF-185, FlPS Software Summary, is attached.

11. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here) Values of critical fracture toughness (K

TC) » fracture energy (Y) , subcritical crack

growth exponents (70 and Young's modulus (E) , are compiled and tabulated for a wide

variety of oxide glasses. A computerized data retrieval system has been formulated

to allow for selection of data by either glass composition, investigator, or experimental technique, and year. Plotting routines allow K or Y to be plotted

versus the mole % of a particular component or the Young's modulus of the glass.

A few illustrations are given to demonstrate trends in K and Y* as a function of

composition and elastic modulus.

12. KEY WORDS (Six to twelve entries; alphabetical order; capitalize only proper names; and separate key words by semicolons)

crack growth exponents; elastic modulus; fracture database; fracture mechanics;

fracture toughness; oxide glasses

13. AVAILABILITY

[X] Unlimited

1 For Official Distribution. Do Not Release to NTIS

[X~l Order From Superintendent of Documents, U.S. Government Printing Office, Washington, DC

20402.

^j Order From National Technical Information Service (NTIS), Springfield, VA 2216 I

14. NO. OF

PRINTED PAGES

91

15. Price

'U.S. GOVERNMENT PRINTING OFFICE : 1985- 461-105 : 201 38 USCOMM-DC 85-6006
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