2012 Fiscal Year Final Research Report
Effects of microstructure and strain incompatibility on micro-crack generation
| Project/Area Number |
22560073
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Yokohama National University |
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Principal Investigator |
UMEZAWA Osamu 横浜国立大学, 大学院・工学研究院, 教授 (20343171)
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| Co-Investigator(Kenkyū-buntansha) |
MOROOKA Satoshi 横浜国立大学, 大学院・工学研究院, 研究教員 (10534422)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 疲労き裂 / ひずみ不整合 / 不均一変形 / 中性子散乱回折 / 粒応力 / 完全拘束モデル |
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| Research Abstract |
Heterogeneous deformation in high-cycle fatigue of a-titanium alloy, austenitic steel and silicon steel has been characterized with electron or neutron diffraction techniques as well as modeling based on Taylor analysis. Subsurface crack generation model due to strain incompatibility in the vicinity of grain boundaries was proposed; the incompatibility may form a microstructural cracking with crack opening stress and microcrack growth with heterogeneous slip in the specimen interior.
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