2017 Fiscal Year Final Research Report
The effect of stress rate on hydrogen embrittlement mechanisms and the construction of quantitative evaluation on the characteristic of hydrogen embrittlement
| Project/Area Number |
16K17976
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Shonan Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | 水素脆化 / 数値解析 / ひずみ速度 / 疲労 |
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| Outline of Final Research Achievements |
In this study, the effect of stress rate on hydrogen concentration behavior under cyclic loading condition was clarified by numerical analyses and fatigue tests of hydrogen charged specimen. The following results were obtained.
1) The numerical analysis for the effect of stress rate on hydrogen diffusion and concentration behavior under cyclic loading condition was conducted. From this analysis, the effect of stress rate on work hardening has no influence on hydrogen concentration behavior. And the possibility that hydrogen concentration capacity can be estimated by the triaxial factor was indicated.
2) Fatigue tests of hydrogen charged specimen were conducted. From these results, a change of crack growth behavior was found by loading rate. This result indicates a possibility that hydrogen embrittlement mechanism depends on stress rate.
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| Free Research Field |
材料強度学
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