镁合金塑性变形机制及动态再结晶研究进展

Research Achievements of Plastic Deformation Mechanism and Dynamic Recrystallization of Magnesium Alloy

综述镁及镁合金在室温下塑性变形机制和高温下动态再结晶行为,总结镁合金塑性变形机制和动态再结晶的研究进展。结果表明:工艺参数、加工工艺、合金元素等均能影响镁合金的塑性成形过程,孪生能有效促进非基面滑移,动态再结晶作为一种重要的晶粒细化机制能有效启动晶界处的棱柱面滑移,提高镁合金的塑性。指出优化工艺参数,研发新型工艺,细化晶粒尺寸是变形镁合金发展的重要方向。

This paper reviews the mechanism of plastic deformation in magnesium and its alloy at room temperature and dy-namic recrystallization behavior at high temperature, summarizes the research development of the plastic deformation mecha-nism of magnesium alloy and dynamic recrystallization. The results show that the process parameters, processing technology and alloy elements can affect the plastic forming process of magnesium alloy, twin can effectively promote the basal slip;as an important mechanism of grain refinement mechanism, the dynamic recrystallization can effectively start the prism surface of grain boundary sliding, thus to improve the plasticity of magnesium alloy. It points out that it is the important development di-rection of magnesium alloy to optimize the process parameters, research and develop the new technology, refine the grain size.