Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys

查看全文 作　　者：Hongxin [1,2]Liao;Jonghyun [1,2]Kim;Taekyung [3]Lee;Jiangfeng [1,2]Song;Jian [1,2]Peng;Bin [1,2]Jiang;Fusheng [1,2]Pan

机构地区：[1]College of Materials Science&Engineering,Chongqing University,400044,China;[2]National Engineering Research Center for Magnesium Alloys,Chongqing University,400044,China;[3]School of Mechanical Engineering,Pusan National University,Busan 46241,Korea

出　　处：《Journal of Magnesium and Alloys》索引2020年第8卷第4期,共8页

摘　　要：The mechanical properties and microstructure were investigated under different Zn content and heat treatment conditions in a Mg-Zn-YGd cast alloy.A part of the long period stacking order(LPSO)phases transformed to W-M^ZnaRE?phases with an increase in Zn content from 0.9 at.%to 1.8 at.%,and the ultimate tensile strength(UTS)increased from 229 MPa to 248 MPa.With solution treatment at 480°C,the content of the LPSO phase and strength sharply decreased in the Mg-1.8Zn-0.8Y-0.8Gd alloy,whereas this change was not significantly observed in the Mg-0.9Zn-O.8Y-O.8Gd alloy.After solution treatment,the elongation significantly improved and the UTS sharply decreased in both alloys.The lamellar and filminess LPSO phases were observed with aging treatment at 200℃.Moreover,the strengthening efficiency of lamellar and filminess LPSO phases was lower than that of the block LPSO phases.Therefore,the UTS of the T6 state was lower than that of the as-cast alloy. 关键词：Mg alloy LPSO Age behavior Mechanical properties Heat treatment Strengthening efficiency

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Effect of heat treatment on LPSO morphology and mechanical properties of Mg-Zn-Y-Gd alloys

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