The basic principles and features of friction welding were introduced.The research progresses in friction welding of Mg alloys were reviewed.The process,joining mechanism,microstructure and mechanical properties of Mg-Mg similar and Mg-Al dissimilar friction welded joints were primarily discussed.Meanwhile,the current problems were analyzed.It was pointed out that the temperature field,stress-strain field and plastic flow during the friction welding process of Mg alloys require further investigation.Furthermore,the future development should focus on the optimization of process and intermediate layer to obtain high quality joints.%介绍了摩擦焊的基本原理及特点,综述了镁合金摩擦焊的研究进展,重点讨论了Mg-Mg同种材料和Mg-Al异种材料摩擦焊工艺、连接机理、接头微观组织及其力学性能.同时分析了目前研究中存在的问题,指出镁合金摩擦焊接头的三维温度场、应力应变场、塑性流变机制等研究尚需进一步完善,此外工艺优化和设置成分过渡层是获得优质摩擦焊接头的发展方向.
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