Source: http://codeofchina.com/standard/GBT228.4-2019.html
Timestamp: 2020-04-10 12:44:59
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GB/T 228.4-2019 English Version, GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium (English Version) - Code of China
Position: Chinese Standard in English/GB/T 228.4-2019
GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium (English Version)
Standard No.: GB/T 228.4-2019 Status: to be valid remind me the status change
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Detail of GB/T 228.4-2019
Introduction of GB/T 228.4-2019
Contents of GB/T 228.4-2019
Standard No.: GB/T 228.4-2019
English Name: Metallic materials—Tensile testing—Part 4:Method of test in liquid helium
Chinese Name: 金属材料 拉伸试验 第4部分：液氦试验方法
Chinese Classification: H22 Metal mechanical property test method
ICS Classification: 77.040.10 77.040.10 Mechanical testing of metals 77.040.10
Issued on: 2019-08-30
Superseding: GB/T 24584-2009 Metallic materials—Tensile testing—Method of test in liquid helium
1 Scope This part of GB/T 228 specifies the principles, definitions, symbols and designations, test piece and determination of its size, apparatus, test conditions, determination of the properties and test report of tensile testing of metallic materials in liquid helium (the boiling point is -269 °C or 4.2 K, designated as 4 K). This part is applicable to the determination of tensile properties of metal materials in liquid helium. This part may apply also to tensile testing at cryogenic temperatures (less than -196 °C or 77 K), which requires special apparatus, smaller test pieces, and concern for serrated yielding, adiabatic heating, and strain-rate effects. Note: The boiling point of the rare 3He isotope is 3.2 K. Usually, the tests are performed in 4He or a mixture of 3He and 4He with a high concentration of 4He. Therefore, the temperature is, as designated before, 4 K. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 228.1-2010	Metallic Materials — Tensile Testing — Part 1: Method of Test at Room Temperature (ISO 6892-1:2009, MOD) GB/T 228.3	Metallic Materials — Tensile Testing — Part 3: Method of Test at Low Temperature (GB/T 228.3-2019, ISO 6892-3:2015, MOD) GB/T 12160	Calibration of Extensometer Systems Used in Uniaxial Testing (GB/T 12160-2002, ISO 9513:1999, IDT) GB/T 16825.1	Verification of Static Uniaxial Testing Machines — Part 1: Tension/Compression Testing Machines — Verification and Calibration of the Force-measuring System (GB/T 16825.1-2008, ISO 7500-1: 2004, IDT) GB/T 34104	Metallic Materials — Verification of the Alignment of Testing Machines (GB/T 34104-2017, ISO 23788:2012, MOD) 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB/T 228.1, GB/T 228.3 and the following apply. 3.1 adiabatic heating internal heating of a test piece resulting from deformation under conditions such that the heat generated by plastic work cannot be quickly dissipated to the surrounding cryogen 3.2 axial strain longitudinal strains measured at opposite or equally spaced surface locations on the sides of the longitudinal axis of symmetry of the test piece Note: The longitudinal strains are measured using two or more strain-sensing transducers located at the mid-length of the parallel length. 3.3 bending strain difference between the strain at the surface of the test piece and the axial strain Note: The bending strain varies around the circumference and along the parallel length of the test piece. 3.4 dewar vacuum-insulated container for cryogenic fluids 3.5 discontinuous yielding strength Ri peak stress at the initiation of the first measurable serration on the stress-strain curves 3.6 tensile cryostat test apparatus for applying tensile forces to test pieces in cryogenic environments
Foreword	II Introduction	IV 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols and Designations 5 Principle 6 Apparatus 7 Test Piece 8 Testing Conditions 9 Determination 10 Test Report 11 Measurement Uncertainty Annex A (Informative) Examples of Test Pieces for Tensile Testing in Liquid Helium
*GB/T 228.3-2019 Metallic materials—Tensile testing—Part 3:Method of test at low temperature
*GB/T 12160-2019 Metallic materials—Calibration of extensometers systems used in uniaxial testing
*GB/T 16825.1-2008 Verification of static uniaxial testing machines - Part 1：Tension/compression testing machines - Verification and calibration of the force-measuring system
*GB/T 34104-2017 Metallic materials--Verification of the alignment of testing machines
Referred in GB/T 228.4-2019:
Standard No. GB/T 228.4-2019
GB/T 228.4-2019
Metallic materials—Tensile testing—Part 4:Method of test in liquid helium
金属材料 拉伸试验 第4部分：液氦试验方法
GB/T 24584-2009 Metallic materials—Tensile testing—Method of test in liquid helium
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