Microstructure and mechanical properties of Mg-6Al-0.3Mn-0.9Y alloy
Mg-6Al-0.3Mn-0.9Y (mass fraction,%) magnesium alloy was prepared by metal mould casting.The as-cast ingot was homogenized,and then hot-rolled with total thickness reduction of 70%.Further annealing treatment was carried out on the hot-rolled sample.Microstructure and mechanical properties of the studied alloy in as-cast,hot rolled and annealed states were investigated.Results showed that main phases of the as-cast sample were composed of α-Mg,Mg17Al12 and Al2Y.Average grain size was about 9 μm after hot rolling and annealing treatment.It is found that the optimal annealed parameters for the Mg-6Al-0.3Mn-0.9Y alloy should be 350 ℃ for annealed temperature and 30 min for the corresponding time,respectively.Tensile test results showed that ultimate tensile strength,yield strength and elongation of the annealed sample were 261 MPa,149 MPa and 32%,respectively.Compared with those of the as-cast sample,they were enhanced by 36%,140% and 146% correspondingly.
Magnesium alloy Yttrium Hot rolling Microstructures Mechanical properties
G.H.SU Z.Y.CAO X.R.LIU Y.SUN
Department of Materials Engineering, Yancheng Institute of Technology, Yancheng 224051, China Department of Materials Science and Engineering, Jilin University, Changchun 130025, China
国际会议
杭州
英文
44-48
2012-03-23（万方平台首次上网日期，不代表论文的发表时间）