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。
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.
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