Mg-Sn基合金沉淀强化研究进展  

Research Progress on Precipitation Strengthening of Mg-Sn Based Alloys

作　　者：马云飞 杨文朋[1,2] 金垒 陈亮 崔红保[1,2] MA Yunfei;YANG Wenpeng;JIN Lei;CHEN Liang;CUI Hongbao(School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;Henan International Joint Research Laboratory for High-Performance Light Metallic Materials and Numerical Simulations,Henan Polytechnic University,Jiaozuo 454000,Henan,China)

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]河南理工大学河南省高性能轻金属材料及其数值模拟国际联合实验室,河南焦作454000

出　　处：《材料导报》2024年第S01期447-453,共7页Materials Reports

基　　金：国家自然科学基金面上项目(51571086);河南省科技攻关(242102230058);河南省高校基本科研业务费专项资金(NSFRF240602)。

摘　　要：Mg-Sn基合金是应用前景广阔的时效强化型合金,添加合金元素可以细化Mg_(2)Sn沉淀相,并增强其时效强化效果,合金化元素选择及添加量是优化Mg-Sn合金力学性能的关键因素。本文总结了6种有理和9种无理的Mg_(2)Sn与Mg基体的取向关系,具有有理取向的Mg_(2)Sn沉淀位于基面呈板状和棒状,而无理取向的Mg_(2)Sn沉淀为非基面的板状和盘状。结合形貌和取向,进一步综述合金元素对Mg_(2)Sn沉淀相形核和生长的影响规律,其中Al、Zn元素促使非基面Mg_(2)Sn相析出;Ag、Na元素为Mg_(2)Sn相提供更多的形核位点;Ca和Y元素形成高熔点的三元相,时效效果不理想。基于研究现状,展望了Mg-Sn基合金研究趋势和方向。Mg-Sn based alloys are aging strengthening alloys with broad application prospect.The addition of alloying elements can refine Mg_(2)Sn precipitates and enhance its aging strengthening effect,and the selection and addition of alloying elements are the key factors to optimize the mechanical properties of Mg-Sn alloys.In this paper,6 kinds of rational and 9 irrational orientation relationships(ORs)between Mg_(2)Sn and Mg matrix are summarized.The Mg_(2)Sn precipitates with rational OR are plate-like and rod-like on the basal plane,while irrationally oriented Mg_(2)Sn precipitates are lath-like and plate-like on the non-basal plane.Combined with morphology and ORs,the effects of alloying elements on the nucleation and growth of Mg_(2)Sn precipitates are further reviewed.Al and Zn elements promote the precipitation of non-basal Mg_(2)Sn phase;Ag and Na elements provide more nucleation sites for the Mg_(2)Sn phase;Ca and Y elements form a ternary phase with high melting point,and the aging effect is ideal.Based on the research status,the research trends and directions of Mg-Sn-based alloys are prospected.

关 键 词：Mg-Sn合金 沉淀强化 合金化 取向关系 

分 类 号：TG146.2[一般工业技术—材料科学与工程]