Al对Mg-Zn-Y合金组织和拉伸性能的影响
Effect of Al on microstructure and tensile properties of Mg-Zn-Y alloy
李龙 1张磊 1杨伟1
作者信息
- 1. 南昌航空大学航空制造工程学院,江西 南昌 330063
- 折叠
摘要
研究了Al对铸态Mg95Zn4Y1 合金组织和拉伸性能的影响.结果表明:随着Al含量的增加,合金晶粒呈先细化后粗化的趋势.Mg94.7Zn4Y1Al0.3 合金中初生 α-Mg相的晶粒最细,其平均二次枝晶臂间距 λ 31.9 μm,相比 Mg95Zn4Y1 合金降低了28.6%.添加Al有利于合金中I-phase的析出.随着Al含量的增加,合金的拉伸性能呈先升高后降低的趋势.Mg94.7Zn4Y1Al0.3合金表现出最优的室温拉伸性能,其极限拉伸强度和伸长率分别为 211 MPa和 9.7%,相比Mg95Zn4Y1 合金分别提高了 28.7%和 27.6%.
Abstract
Effect of Al on microstructure and tensile properties of as-cast Mg95Zn4Y1 alloy was investigated.The results show that the grains of the Mg95Zn4Y1 alloy show a trend of first refining and then coarsening with the increase of Al content.The grain size of the primary α-Mg phase in the Mg94.7Zn4Y1Al0.3 alloy is the smallest,with an average secondary dendrite arm spacing of 31.9 μm,which is decreased by 28.6%compared to the Mg95Zn4Y1 alloy.The addition of Al is beneficial for the precipitation of I-phase in the alloy.With the increase of Al content,the tensile properties of the alloy show a trend of first increasing and then decreasing.The Mg94.7Zn4Y1Al0.3 alloy exhibits the best room temperature tensile properties,with ultimate tensile strength and elongation of 211 MPa and 9.7%,respectively,which are 28.7%and 27.6%higher than those of the Mg95Zn4Y1 alloy.
关键词
Mg95Zn4Y1/合金/Al/组织/拉伸性能Key words
Mg95Zn4Y1 alloy/Al/microstructure/tensile property引用本文复制引用
基金项目
江西省自然科学基金(20181BAB206005)
出版年
2024
NETL
NSTL
万方数据