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金属学报  1988 

海洋用结构钢在NaCl溶液中疲劳短裂纹的扩展

, PP. 471-475

Keywords: 疲劳短裂纹,结构钢A537,环境介质,应力强度门槛值

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Abstract:

本文用海洋平台结构钢A537CL1的单边裂纹样品,在空气和3.5%NaCl水溶液中进行了腐蚀疲劳短裂纹扩展实验,比较不同裂纹长度及环境介质对疲劳短裂纹扩展行为的影响。结果表明,在门槛值附近,对于相同的应力强度因子范围,短裂纹扩展速率比长裂纹扩展快。短裂纹扩展的门槛值随裂纹长度的减小而减小。与空气介质相比较,盐水对疲劳短裂纹扩展加速的程度远大于长裂纹。

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