Effects of Sn addition on microstructure and mechanical properties of Mg-Zn-Al alloys

作     者：Bo Wang Xianhua Chen Fusheng Pan Jianjun Mao 

作者机构：College of Materials Science and Engineering Chongqing University National Engineering Research Center for Magnesium Alloys Chongqing University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2017年第27卷第6期

页      面：695-702页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financial supports from the National Natural Science Foundation of China (Project 51531002 and 51474043) the Ministry of Education of China (SRFDR 20130191110018) Chongqing Municipal Government (CSTC2013JCYJC60001,CEC project,Two River Scholar Project and The Chief Scientist Studio Project) 

主　　题：Magnesium alloys Sn addition Microstructure Texture Mechanical properties 

摘      要：The effects of Sn addition（0, 0.5, 1.0, 2.0 and 3 wt%） on microstructure of Mg-4Zn-1.5Al alloy in cast and extruded states were investigated, and the mechanical properties of as-extruded Mg-4Zn-1.5Al-xSn studied. The experimental results showed that the as-cast Mg-4Zn-1.5Al alloy was composed of two phases α-Mg and Mg;（Al, Zn）;, while Sn-containing alloys consisted of α-Mg, Mg;（Al, Zn）;and Mg;Sn phases, and Mg;（Al, Zn）;was not detected after extruding due to that the most of them dissolved into the matrix during the homogenized treatment. The addition of Sn refined the grains of as-cast and as-extruded Mg-Zn-Al alloys obviously. It was noted that the basal texture intensity reduced with increasing Sn content significantly in as-extruded Mg-Zn-Al alloys. The tensile tests results indicated that Sn addition improve the tensile strength of the extruded alloys,while it had a harmful effect on the ductility. When the addition of Sn was 2 wt%, the ultimate tensile strength（UTS）, yield strength（YS） and elongation（ε;） of the alloy were 280 MPa, 147 MPa and 17.4%, respectively.