<正> 一、引言 Fe和钢中加入氢会导致其力学性能特别是屈服行为明显的变化.Cracknell等把充氢后屈服台阶的消失归于氢在微孔洞中聚集,形成高压,并导致局部屈服.然而Vaughen等
In view of interaction of hydrogen with point and line defects in initial stage of the plastic deformation, the influence of hydrogen charging on yielding behaviour of Armco-and Vacofer-Fe has been investigated. Various models on hydrogen embrittlement have been discussed. It is considered that the change of mechanical properties induced by hydrogen may be attributed to that hydrogen promotes the thermal activation, increases the movable ability of intestitial atoms and reduces the resistance of dislocation movement.The experimental show that these effects are directly related to the state and distribution of hydrogen atoms in the vicinity of the dislocation.
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