Effects of Heat Treatment on Microstructure Evolution and Mechanical Properties of Mg-6Zn-1.4Y-0.6Zr Alloy
The effects of solution and aging treatments on the microstructure evolution and mechanical properties of the as-cast Mg-6Zn-1.4Y-0.6Zr alloy were investigated.The results indicate that the solution treatment can obviously dissolve the net-like intermetallic compounds (mainly I-phase) into the α-Mg matrix.Meanwhile, the I-phase decomposes gradually above 440 ℃, with the formation of fine W-phase and Mg7Zn3 phase.Further aging treatment results in the precipitation of numerous fine and dispersive particles in the α-Mg matrix.The best mechanical properties of the heat treated alloy are obtained after solution treated at 460 ℃ for 8 h and aged at 200 ℃ for 16 h, with the yield strength (YS), ultimate tensile strength (UTS) and elongation are 208 MPa, 257 MPa and 3.8%, respectively.Compared with the as-cast alloy, the increment of YS and UTS are 117% and 58% respectively, while the decrement of elongation is 46%.
magnesium alloy heat treatment microstructure mechanical properties
WANG Jing FANG Xiao-gang WU Shu-sen Lü Shu-lin
State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
国内会议
2016中国有色合金及特种铸造发展论坛(第3届有色合金及特种铸造技术国际研讨会、第十一届中国国际压铸会议、第九届中国铸造质量标准论坛)
上海
英文
75-82
2016-07-09（万方平台首次上网日期，不代表论文的发表时间）