Microstructure,Texture Evolution,and Strain Hardening Behaviour of As-extruded Mg-Zn and Mg-Y Alloys under Compression  

作　　者：HAN Xiuzhu XIAO Tao YU Zijian 

机构地区：[1]Beijing Institute of Spacecraft System Engineering,Beijing,100094,China [2]Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing,100124,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第2期430-439,共10页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Beijing Municipal Natural Science Foundation (No.2202004);the National Natural Science Foundation of China (No.51801048);the Basic Research Fund for Newly Enrolled Teachers and the Fund for Distinguished Young Scholars of China Academy of Space Technology。

摘　　要：Microstructure,texture evolution and strain hardening behaviour of the Mg-1Y and Mg-1Zn(wt%)alloys were investigated under room temperature compression.Microstructural characterization was performed by optical microscopy,scanning electron microscopy,electron back scattered diffraction and transmission electron microscopy.The experimental results show that Mg-1Zn alloy exhibits conventional three-stage strain hardening curves,while Mg-1Y alloy exhibits novel six-stage strain hardening curves.For Mg-1Y alloy,rare earth texture leads to weak tensile twinning activity in compression and consequently results in a moderate evolution to<0001>texture.Moreover,inefficient tensile twinning activity and weak slip-twinning interaction give rise to excellent ductility and high hardening capacity but low strain hardening rate.For Mg-1Zn alloy,basal texture leads to pronounced tensile twinning activity in compression and consequently results in rapid evolution to<0001>texture.The intense tensile twinning activity and strong slip-twinning interaction lead to high strain hardening rate but poor ductility and low hardening capacity.

关 键 词：magnesium alloy texture rare earth TWINNING strain hardening behavior 

分 类 号：TG146.22[一般工业技术—材料科学与工程]