<正> 钢的氢脆研究,目前大部分都采用拉伸、持久和断裂韧性测试等方法。这些方法,对于促进氢脆机理的研究和工程应用都起了重要的作用。但在工程上,大部分动部件所受载荷都是交变的,而不是受静载拉伸。所以,也有人认为用低周疲劳来评价氢脆敏感性要比慢拉伸和静持久更为切合实际。我们选择了最简单的交变方式,即梯形波加载代替纯持久加载,以探讨疲劳因子对氢致滞后破坏的影响。
Hydrogen-induced fracture of electrolytic charged, sharp notched specimens ofsuper-high strength steel 30CrMnSiNi2A has been studied by means of cyclic ladder waveformloading tests and SEM examination. The results show that the time to fracture decreases withthe decrease of dwell period of the load. It was considered that hydrogen transported by disloca-tions significantly effects the hydrogen-induced delayed fracture of the steel.
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