总结了稀土元素在镁合金中的具体作用,并指出稀土元素对镁合金力学性能有较大影响。综述了常见的Mg-RE合金,包括常规合金添加少量稀土、Mg-Nd-Y等常见的耐热镁合金体系以及近年来研究很热的LPSO相镁合金,并分别对其组织和力学性能进行概述。最后针对目前研究高强韧镁合金所存在的难题,提出了合金化、塑性变形和热处理工艺始终是提高镁合金力学性能的主要手段。 The specific functions of rare earth elements in magnesium alloys are summarized, and the effects of rare earth elements on the mechanical properties of magnesium alloys are also discussed. The common Mg-RE alloys are reviewed, including the conventional alloys with a small amount of rare earth, Mg-Nd-Y and other common heat-resistant magnesium alloy systems and LPSO-phase magnesium alloys studied in recent years. The microstructures and mechanical properties of Mg- Overview. Finally, aiming at the problems existing in the research of high strength and toughness magnesium alloy, the alloying, plastic deformation and heat treatment process are always the main means to improve the mechanical properties of magnesium alloy.