Atomic scale phenomena during various types of hydrogen embrittlement testing were examined by investigating hydrogen desorption during the tests using tempered martensitic steel and cold-drawn pearlitic steel specimens. Hydrogen desorption increased in the elastic stage of constant stress/strain and cyclic stress testing, implying hydrogen transportation by dislocations. In contrast, hydrogen desorption increased in the elastic stage but turned downward near proof stress and finally deceased to less than that before stress application. This implies that hydrogen-enhanced strain-induced lattice defects such as dislocations and vacancies formed in addition to hydrogen accumulation by mobile dislocations. These results suggest that one of the reasons for the high hydrogen embrittlement susceptibility of high strength steels is hydrogen accumulation on the grain boundaries and cementite interfaces due to hydrogen transportation by mobile dislocations under elastic deformation.

通过研究使用回火马氏体钢和冷拔珠光体钢试样在测试过程中的氢解吸，研究了各种类型的氢脆测试中的原子尺度现象。在恒定应力/应变和循环应力测试的弹性阶段，氢的解吸增加，这表明氢通过位错传输。相反，氢的解吸在弹性阶段增加，但是在屈服应力附近转向向下，最终下降到小于施加应力之前的水平。这暗示着氢增强的应变诱发的晶格缺陷，例如除了位错和氢的移动位错外，还形成了位错和空位。