2012 Fiscal Year Final Research Report
Development of prediction method of the reduced fatigue strength at contact part between components that is caused by the effect of hydrogen
| Project/Area Number |
22560084
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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 | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | 水素 / フレッティング / 金属疲労 |
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| Research Abstract |
Hydrogen is the most promising means of solving the energy and global environment issues. However, hydrogen deteriorates strength of metallic materials. In this study, a design method in which the effect of hydrogenis considered is developed, particularly for the components of hydrogen equipment involving contact part. Firstly, a significant reduction in the fatigue strength of the contact part is characterized. The causes of the reduced fatigue strength, which are the specific wear in hydrogen and the assist of crack nucleation by hydrogen, are then elucidated. Based on fracture mechanics, the design method of the components of hydrogen equipment involving contact is established by considering these mechanisms that hydrogen causes the reduction in fatigue strength.
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