On the microstructure and mechanical property of as-extruded MgeSneZn alloy with Cu addition
This work explored the effect of Cu addition on the microstructure characteristics and tensile properties of as-extruded Mge8Sne2Zn alloys.Results indicated that adding Cu caused the formation of MgZnCu phase with a face-center cubic structure(a1/4 0.7169 nm)and exhibited subtle grain refinement effect of the as-cast alloys.Moreover,the volume fraction of MgZnCu phase increased as Cu content increased.Appropriate Cu addition could refine the precipitates and increase the number density of precipitate of as-extruded alloys,which resulted in the refinement of grains and weakening of texture intensity.However,extensive addition of Cu increased the size of secondary phases,thereby resulted in weak grain boundary pinning effect and growth of dynamic recrystallized grains.Such grain growth might cause the growth selection of grains with the predominant orientation of extruded fiber texture.The as-extruded Mge8Sne2Zne0.5Cu alloy exhibited the optimal yield strength of 365.9 MPa and ultimate tensile strength of 388.4 MPa.High strength values were expected due to the high number density of micronsized broken MgZnCu and Mg2Sn particles,as well as nano-sized Mg2Sn precipitates and fine grains..
MgeSneZn alloys Cu addition
Yongjian Wang Jian Peng Liping Zhong
State Key Laboratory of Mechanical Transmission,College of Materials Science and Engineering,Chongqi State Key Laboratory of Mechanical Transmission,College of Materials Science and Engineering,Chongqi
国内会议
四川自贡
英文
74-86
2018-05-25（万方平台首次上网日期，不代表论文的发表时间）