実験報告書様式（一般利用課題・成果公開利用）

MLF Experimental Report

提出日 Date of Report

課題番号 Project No.

装置責任者 Name of responsible person

2009B0025

Kazuya Aizawa

実験課題名 Title of experiment

Stefanus Harjo

Development of In-situ material evaluation technique using

装置名 Name of Instrument/（BL No.）

TAKUMI diffractometer

BL19

実験責任者名 Name of principal investigator

実施日 Date of Experiment

Hiroshi Suzuki

15/5/2010-18/5/2010

所属 Affiliation
Japan Atomic Energy Agency
試料、実験方法、利用の結果得られた主なデータ、考察、結論等を、記述して下さい。（適宜、図表添付のこと）
Please report your samples, experimental method and results, discussion and conclusions. Please add figures andtables for better explanation.
1. 試料 Name of sample(s) and chemical formula, or compositions including physical form.
Specimens: S45C dumbbell type specimen

2. 実験方法及び結果 （実験がうまくいかなかった場合、その理由を記述してください。）
Experimental method and results.

If you failed to conduct experiment as planned, please describe reasons.

2.1 Development of Load Frame with Furnaces
Furnace system which can be put on the load frame of the TAKUMI diffractometer was developed. Figure 1 shows
schematic drawing of load frame with a furnace unit (a) and its photograph (b). The furnace unit consists of an infrared
image furnace heating from four directions and a vacuum chamber unit. The maximum temperature was 1000oC andeffective heating length is 15xL50mm. Load capacity is 50 kN in tension and 20kN in compression. The vacuum
chamber unit can control atmospherei.e. inert gas, vacuum and air. The CCD(b)(a)
camera mounted on the load frame canmeasure elongation of specimen bymeasuring the distance between
markers such as projections on thespecimen as shown in insert photographin Fig. 1(b). Neutron can pass throughinterspaces between top and bottom
furnaces.
Fig.1 Schematic drawing of the load frame with furnace (a) and its photograph (b).

12. 実験方法及び結果（つづき） Experimental method and results (continued)
2.2 Offline Test

450

400

RT

Elastic deformation

350
Tensile stress, MPa(1) Tensile test
Dumbbell type specimen with 5mm diameter was set on the load
frame with a thermocouple. Tensile test was carried out at room
temperature and 1000oC in vacuum and cross-head speed was set at
0.1 mm/min. Figure 2 shows change in macroscopic strains as afunction of applied stress. The specimen was yielded at approx. 30
MPa at 1000oC and showed plastic deformation more than 10 %,whereas elastic deformation was observed until 400 MPa at roomtemperature.

300
250
200
150

Tension

10050

Plastic deformation

1000oC0.02

0.1

02.3 On-beam Test
S45C dumbbell type specimen with 6mm diameter and 9mm
length of parallel part was set on the load frame with athermocouple. Diffraction patterns were measured during tensileloading at room temperature and 600oC. Figure 4 shows peak shiftsof 110 reflection and change in macroscopic displacement at 600oC
as a function of applied stress. Lattice spacing wasclearly increased in an elastic region at room
temperature, and then became almost constant in aRTplastic region, and the peak width was graduallybroadened probably due to increase in dislocation
densities. In contrast, increase in lattice spacing
was not clearly observed at 600oC since elastic
region was negligible. It is notable that effect of
annealing sharpened the peak width even though
plastic deformation was increased.

-0.02

00.04

0.060.08

0.12

0.14

Tensile strain

Fig.2 Relationship between tensile applied stressand macroscopic strain at RT and 1000oC.
450
400

RT

Elastic deformation

350

Compressive stress, MPa(2) Compression test
Dumbbell type specimen with 6mm diameter and 9mm length ofparallel part was utilized. Compression test was carried out at room
temperature and 1000oC in vacuum and cross-head speeds at room
temperature and 1000oC were set at 0.1 mm/min and 0.2 mm/min,respectively. As shown in Fig. 3, the specimen was yielded atapprox. 25 MPa at 1000oC and showed large plastic deformation
more than 40 %, whereas elastic deformation was observed until
400 MPa at room temperature. However, macroscopic shear
deformation was observed as shown in insert photographs in Fig. 3
due to misalignment of load axis, which is problem to be solved.

300

250
200
150
100Compression

Plastic deformation 1000oC

500-0.1

00.1
0.2
0.3
Compressive strain

0.40.5

Fig.3 Relationship between compressive appliedstress and macroscopic strain at RT and 1000oC.
BCC (1 1 0)

600℃

Macroscopic
displacement (mm)600℃

2.3 ConclusionsWe developed furnace system which can be puton the load frame of the TAKUMI diffractometer,
and it was confirmed that change in diffraction
pattern can be measured under tensile loading athigh temperature. This system will be helpful formaterials evaluation under process and in services.

d (Å)

Load (N)Fig.4 peak shifts of 110 reflection and change in macroscopic

displacement at 600oC as a function of applied stress.

2