Effects of aging treatment processes on microstructures and mechanical properties of AZ63 casting magnesium alloy  

作　　者：Chun-yu Li Hao-bo Wei Shi-hui Ruan Jie-yi Chen Zong-gang Wu Ming-bo Yang 

机构地区：[1]Materials Science&Engineering College,Chongqing University of Technology,Chongqing 400050,China

出　　处：《China Foundry》2023年第4期307-314,共8页中国铸造（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2018YFB1106800);the National Natural Science Foundation of China(Grant No.51771152)。

摘　　要：The effects of three different aging treatment processes,namely single-stage,double-stage,and reverse double-stage aging treatment processes,on the microstructures and mechanical properties of the AZ63(Mg-6Al-3Zn-0.25Mn)casting magnesium alloy were investigated and compared.The results indicate that the microstructures of all the aged alloys under the three treatment processes are mainly composed ofα-Mg,Mg17Al12),and Al4Mn phases,indicating that the double-stage and reverse double-stage aging treatments have no obvious effect on the type of alloy phases.However,as compared with the single-stage and double-stage processes,the reverse double-stage process has a great effect on the quantity of the Mg17Al12phases.After the reverse double-stage aging treatment,which results in a stronger drive for decomposition of the supersaturated solid solution,the number of Mg17Al12phases precipitated in the grains significantly increases.In addition,as compared with the single-stage aged alloy,the tensile properties at room temperature for both the double-stage and reverse double-stage aged alloys are significantly improved.Among them,the reverse double-stage aged alloy achieves the highest tensile strength,yield strength,and elongation of 295 MPa,167 MPa,and 8.6%,respectively.

关 键 词：magnesium alloys Mg-Al based alloys AZ63 alloy heat treatment aging treatment 

分 类 号：TG146.22[一般工业技术—材料科学与工程]