手机知网 App
24小时专家级知识服务
打 开
金属学及金属工艺
Microstructure,mechanical properties and corrosion resistance of as-cast and as-extruded Mg-4Zn-1La magnesium alloy
Microstructure,mechanical properties and corrosion resistance of as-cast and as-extruded Mg-4 wt% Zn-1 wt% La magnesium alloys were investigated.The alloys were produced by low-pressure die casting method and extruded at 350℃ after homogenization at 400℃ for 24 h.The results show that the as-cast alloy mainly consists of primary α-Mg matrix and Mg-Zn-La ternary second phases(also called T-Phase) along grain boundaries and isolated spherical particles inside the grains.After extrusion at350℃,the average grain size decreases by 81% due to dynamic recrystallization mechanism and T-phase particles are distributed along the extrusion direction.The elongation,yield strength and tensile strength of the as-cast Mg-4Zn-1La alloy increase by 179%,90% and 40%,respectively,as a result of the extrusion process.The as-extruded Mg-4Zn-1La alloy shows better corrosion resistance than the as-cast alloy due to increased grain boundaries and decreased content of T-phase.
0 7
手机阅读本文
下载APP 手机查看本文
Rare Metals
2020年08期

搜 索