2013 Fiscal Year Final Research Report
Concurrent material damage evaluation using diffraction contrast imaging by ultra-bright synchrotron radiation
| Project/Area Number |
23360056
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Kobe University |
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Principal Investigator |
NAKAI Yoshikazu 神戸大学, 工学(系)研究科(研究院), 教授 (90155656)
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| Co-Investigator(Kenkyū-buntansha) |
SHIOZAWA Daiki 神戸大学, 大学院工学研究科, 准教授 (60379336)
TANAKA Hiroshi 神戸大学, 大学院工学研究科, 准教授 (80236629)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | マイクロ材料力学 / シンクロトロン放射光 / 疲労 / 金属組織 |
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| Research Abstract |
The three dimensional grain mapping technique for polycrystalline material, which is called X-ray diffraction contrast tomography (DCT) has proposed. In the present study, the measurement of DCT was conducted in SPring-8, which is the brightest synchrotron radiation facility in Japan, and the condition of measurement and data procedure are discussed. Developed technique was applied to aluminium alloy and stainless steel. The shape and location of grain could be determined by the developed three-dimensional mapping technique using the apparatus in a bending beam line of SPring-8. To evaluate plastic deformation, the grain orientation spreads of individual grains were measured. The grain orientation spread is caused by the mosaicity, which relates to the dislocation structure in a grain. The grain orientation spread was found to increase with increasing plastic strain. Fatigue damage also could be evaluated by the grain orientation spread in the DCT measurement.
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