采用热充氢方法研究了1Cr18Ni9Ti、21Cr6Ni9Mn、Fe31Cr14Ni奥氏体不锈钢的氢脆性能.采用垂直截面法测量了不同热充氢时间拉伸试样的断口分形维数,分析了材料氢脆性能与分形维数的相关性.研究表明:随着充氢时间的延长,3种材料内部氢含量增加、断面收缩率降低、氢致塑性损减增加.反映在断口分形维数上,表现为断口分形维数随充氢时间的延长而降低,且断口分形维数与其断面收缩率呈线性相关.断口分形维数能够描述氢对材料性能的影响.
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