疲劳裂纹扩展行为是现代材料研究中重要的内容之一.论述了组织结构、环境温度、腐蚀条件以及载荷应力比、频率变化对材料疲劳裂纹扩展行为的影响.总结出疲劳裂纹扩展研究的常用方法和理论模型,并讨论了"塑性钝化模型"和"裂纹闭合效应"与实际观察结果存在的矛盾.最后,对钛合金疲劳裂纹扩展研究的内容和研究结果进行了概述.
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