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搅拌摩擦焊(FSW)接头的抗疲劳断裂特性是评定其构件使用性能的重要指标之一.本文对搅拌摩擦焊的接头疲劳行为研究现状做了比较详尽的总结,涉及S-N曲线、裂纹扩展速度da/dN和门槛值△Kth,腐蚀环境下的裂纹扩展速度和门槛值、显微组织及影响因素,并提出了今后需要解决的问题.

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