变形镁合金疲劳行为的研究现状

摘要

Research progress on the fatigue behavior of wrought magnesium alloys is summarized on the basis of fatigue cyclic deformation response,fatigue life,fatigue crack initiation and propagation,etc.The effects of loading condition,environment and surface state on the fatigue behavior of wrought magnesium alloys are described emphatically.It is proposed that the methods including rare earth elements addition,shot peening,surface rolling and appropriate heat treatment can improve the fatigue strength and prolong fatigue life of wrought magnesium alloys.The advantages and disadvantages of these methods are analyzed.The development of fatigue research on wrought magnesium alloys is prospected.%从疲劳循环变形响应行为、疲劳寿命、疲劳裂纹萌生与扩展等方面,综述了变形镁合金疲劳行为的研究现状,重点介绍了加载条件、环境、表面状态等对变形镁合金疲劳性能的影响,指出添加稀土元素,进行喷丸、表面滚压处理和合理的热处理可提高变形镁合金的疲劳强度,延长疲劳寿命,并分析了各种方法的优劣.对变形镁合金疲劳研究的发展方向进行了展望.