| 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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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
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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 / 機械材料・材料力学 / 高輝度放射光 / CTイメージング / 損傷評価 / 結晶構造 / 材料強度 / Braggの回折条件 / 回折コントラスト法 / 結晶粒 / 非破壊検査 |
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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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