2009 Fiscal Year Final Research Report
Wide-area SEM observation of dislocation structures and the restructuring of fracture estimation model
| Project/Area Number |
19206076
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka City University |
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Principal Investigator |
HASHIMOTO Satoshi Osaka City University, 大学院・工学研究科, 教授 (50127122)
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| Co-Investigator(Kenkyū-buntansha) |
KANEKO Yoshihisa 大阪市立大学, 大学院・工学研究科, 講師 (40283098)
VINOGRADOV Alexei 大阪市立大学, 大学院・工学研究科, 准教授 (10283102)
NAKAMURA Atsutomo 大阪市立大学, 大学院・工学研究科, 講師 (20419675)
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| Co-Investigator(Renkei-kenkyūsha) |
MIYAMOTO Hiroyuki 同志社大学, 理工学部, 教授 (10298698)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 強度 / 靱性 / 破壊 / 疲労 / 応力腐食割れ |
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| Research Abstract |
Microstructures of metallic materials fractured under various conditions were analyzed using the electron channelling contrast imaging (ECCI) technique which enables us to observe dislocation in a scanning electron microscope, and the electron backscatter diffraction (EBSD) technique. Based on the microstructure analyses, we developed the method to determine fracture process, and investigated factors which determine crack propagation path and crack initiation site. Fatigue damage of ultrafine-grained materials could also be estimated with these techniques.
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