稀土元素对镁合金力学行为影响的研究现状

系统论述了不同稀土元素的结构特性,基于镁合金的强化机制,并结合当前稀土镁合金的研究现状,展示了稀土元素的添加对镁合金在强度、塑性及抗蠕变性能等方面带来的变化,尤其是对镁合金塑性的影响.其中,区别于传统的强化机制,对添加稀土元素后出现的LPSO结构相对镁合金性能的影响也进行了重点讨论,进一步对镁合金中的稀土元素合金化后的改性作用及前景进行了探讨和展望.

Rare Earth Alloying:Toward High Mechanical Properties for Magnesium Alloys

The basic mechanisms of rare earth elements additions in magnesium alloys were reviewed, including the solid solution strengthening, grain refinement and long period stacking ordered (LPSO) phase. A brief overview of the available rare earth elements was given, along with a summary of the type, the special mechanism, chemical or physical effects and other unique properties achieved by previous researches on the rare earth element additions on magnesium alloys. Finally, certain challenging problems that the research faced and future expectations of Mg-RE alloys were stated and discussed.