2010 Fiscal Year Final Research Report
Investigation into the degradation mechanism of environmental embrittlement using integrated in-situ nano mechanical testing
| Project/Area Number |
20360054
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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 | Osaka University |
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Principal Investigator |
MINOSHIMA Kohji Osaka University, 工学研究科, 教授 (50174107)
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| Co-Investigator(Kenkyū-buntansha) |
HIRAKATA Hiroyuki 大阪大学, 工学研究科, 准教授 (40362454)
YONEZU Akio 大阪大学, 工学研究科, 助教 (40398566)
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| Project Period (FY) |
2008 – 2010
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| Keywords | その場観察 / ナノメカニカルテスティング / 水素ぜい化 / 高強度材料 / 塑性特性 |
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| Research Abstract |
In the light of plastic deformation at nano scale, this study investigated the mechanism of hydrogen embrittlement which is caused by hydrogen diffusion into a material. Nano indentation applying to high strength steels and model materials revealed that hydrogen absorption enhanced plastic deformation. This finding was also observed in the interfacial fracture toughness test, indicating that plastic deformation of thin film (which surrounds crack propagation) was promoted by hydrogen absorption, leading the variation in apparent fracture toughness.
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