2010 Fiscal Year Final Research Report
Evaluation of Hydrogen Embrittlement Sensitivity for the Impact Deformation Properties of Metallic Materials by means of Hydrogen Microprint Technique
| Project/Area Number |
20560652
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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 |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
HORIKAWA Keitaro Osaka University, 大学院・基礎工学研究科, 准教授 (50314836)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Hidetoshi 大阪大学, 大学院・基礎工学研究科, 教授 (10205479)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 強度 / 靭性 / 破壊 / 疲労 / クリープ / 応力腐食割れ / 超塑性 / 摩耗 |
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| Research Abstract |
Effect of hydrogen introduced from the atmosphere in the metallic materials on the impact tensile properties was investigated by means of hydrogen microprint technique. It was found that 7075-aluminum alloy with hydrogen-charging indicated severe decrease of the ductility in the impact test. It was also shown that the hydrogen embrittlement sensitivity of 6061 alloy is much lower than that of 7075 alloy even in the impact deformation. Hydrogen microprint technique revealed that the alloy with high sensitivity against the hydrogen embrittlement evolved high amounts of hydrogen at the beginning of plastic deformation as well as at the moment of fracture.
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