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金属学报  1988 

环境对双相钢疲劳性能的影响

, PP. 193-199

Keywords: 腐蚀疲劳,裂纹萌生,裂纹扩展,腐蚀坑,干湿交替

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Abstract:

本文研究了自来水和3.5%NaCl水溶液分别在全浸和干湿交替状态下对热轧双相钢疲劳性能的影响.结果表明与空气中的疲劳寿命相比,腐蚀环境有不同程度的降低作用,并以喷雾盐水影响最大.在相同腐蚀条件下,环境的影响随应力幅的降低而增强.马氏体抗疲劳断裂的能力高于铁素体.试样表面和断口的观察结果发现,腐蚀疲劳裂纹萌生与腐蚀坑密切相关,蚀坑以阳极溶解方式形成.

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