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

采用氢微印刷技术研究了从大气中引入的氢气对金属材料冲击拉伸性能的影响。结果发现，充氢后的7075铝合金在冲击试验中延展性严重下降。研究还表明，即使在冲击变形下，6061合金的氢脆敏感性也远低于7075合金。氢微印刷技术表明，对氢脆具有高敏感性的合金在塑性变形开始以及断裂时会产生大量的氢。

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.