Evaluation of Hydrogen Embrittlement Sensitivity for the Impact Deformation Properties of Metallic Materials by means of Hydrogen Microprint Technique

采用氢微印技术研究了金属材料中大气中引入氢对冲击拉伸性能的影响。在冲击试验中发现充氢后7075-铝合金的延展性明显下降。即使在冲击变形中，6061合金的氢脆敏感性也远低于7075合金。氢微印技术表明，抗氢脆敏感性高的合金在塑性变形初期和断裂时刻都产生了大量的氢。

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.