长周期结构增强镁合金的研究进展

镁合金具有低密度、高比强度、易回收利用等优点,在电子、汽车、航空航天等领域得到了广泛的应用。但是镁合金强度低、变形加工困难等缺点成为阻碍其大规模应用的主要问题。长周期堆垛有序(LPSO)结构增强镁合金具有较高的强度和较好的塑性,引起了人们的广泛关注。列举了镁合金中5种长周期结构类型及其研究进展,分析了常见的4种长周期结构制备方法的特点,阐述了5种长周期结构特征及其表征方法,分析了长周期结构的强化机制,指出了今后的研究方向。

Research Progress of Long Period Stacking Ordered Structure Reinforced Mg Alloys

Magnesium alloy has the advantages of low density,high specific strength,easy recycling and so on. It has been widely used in the fields of electronics,automobile and aerospace.However,it has become a major prob-lem in the large scale application of magnesium alloys because of its low strength,its difficulty of deformation proces-sing and so on.The long period stacking ordered(LPSO)structure reinforced magnesium alloy has aroused wide atten-tion because of its better strength and plasticity.Five types of LPSO structure and their research progress in mag-nesium alloys are listed.The preparation methods of the LPSO structure are analyzed.Five types of LPSO structures and the corresponding characterization methods are described.The strengthening mechanism of LPSO structure is ana-lyzed and the future research direction is pointed out.