Mg-TM-RE系镁合金中LPSO相的研究进展  

Research progress of LPSO phase in Mg-TM-RE alloy

作　　者：罗宇伦 杨鸿 董志华 蒋斌[1,2] 张双艳[1] 张丁非 潘复生[1] LUO Yulun;YANG Hong;DONG Zhihua;JIANG Bin;ZHANG Shuangyan;ZHANG Dingfei;PAN Fusheng(National Engineering Research Center for Magnesium Alloys,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;National Key Laboratory of Advanced Casting Technologies,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学材料科学与工程学院,国家镁合金材料工程技术研究中心,重庆400044 [2]重庆大学材料科学与工程学院,高端装备铸造技术全国重点实验室,重庆400044

出　　处：《中国有色金属学报》2024年第5期1429-1452,共24页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(52371094,52101126,U21A2048,52001037);国防基础科学研究计划资助项目(JCKY2021110B050);中国博士后科学基金资助项目(2021M700566)。

摘　　要：镁合金是最具发展潜力的轻量化材料之一,但相对较低的强度和塑性限制了其工程应用。具有堆垛有序和化学有序特征的长周期堆垛有序(LPSO)相是有望实现镁合金强韧化的新型析出相,受到了越来越广泛的关注。本文总结分析了LPSO相的原子结构特征、形成和转变机制,讨论了不同合金元素对LPSO相稳定性、本征结构物性参数的影响规律,分析了LPSO相对镁合金动态再结晶行为和力学性能的影响机理,并总结了基于LPSO相发展高性能镁合金需解决的关键问题,以期为新型高强韧镁合金的发展提供参考。Magnesium alloy is one of the most promising lightweight material,the industrial applications of which are however limited by the relatively low strength and ductility.The long-period stacking ordered(LPSO)phase characterized with the stacking and chemical ordering is a novel phase expected to improve mechanical properties of magnesium alloys,which has attracted the increasing attention.In the present work,we reviewed on the research progress of LPSO phase.The atomic structure characteristics,formation and transformation mechanism of the LPSO phase were analyzed,the effect of alloying elements on the stability of LPSO phase and intrinsic properties were discussed,and the influence of LPSO on dynamic recrystallization behavior and mechanical properties of magnesium alloys were elaborated.In addition,potential problems need to be solved in developing high-performance magnesium alloys based on LPSO phase were summarized.The present work is expected to provide helpful references for the development of advanced magnesium alloys.

关 键 词：镁合金 LPSO相 结构物性 动态再结晶 强韧化机制 

分 类 号：TG146.2[一般工业技术—材料科学与工程]