Microstructure and Mechanical Properties of Pure Magnesium Subjected to Hot Extrusion  

作　　者：LEI Weiwei WANG Hongxia LIANG Wei 雷维维;ZHU Derong;王红霞;梁伟(School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Advanced Magnesium-based Materials,Taiyuan University of Technology,Taiyuan 030024,China;School of Mechanical Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China)

机构地区：[1]School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]Shanxi Key Laboratory of Advanced Magnesium-based Materials,Taiyuan University of Technology,Taiyuan 030024,China [3]School of Mechanical Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2019年第5期1193-1196,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation of China(Nos.51474152,51274149,51175363)

摘　　要：The as-cast pure magnesium(Mg), with a purity of 99.99%, was hot-extruded at 300 ℃ to prepare a Mg bar with a diameter of 8 mm. The microstructure and mechanical properties of the sample before and after extrusion were investigated. The results show that the as-extruded microstructure is obviously refined with a large number of subgrains rather than equiaxed grains. A great number of(102) tensile twins can be observed significantly in the microstructure at the temperature. Mechanical properties including yield strength(YS) and ultimate tensile strength(UTS) increase greatly but uniform elongation(UE) decreases slightly as a result of work hardening.The as-cast pure magnesium(Mg), with a purity of 99.99%, was hot-extruded at 300 ℃ to prepare a Mg bar with a diameter of 8 mm. The microstructure and mechanical properties of the sample before and after extrusion were investigated. The results show that the as-extruded microstructure is obviously refined with a large number of subgrains rather than equiaxed grains. A great number of(102) tensile twins can be observed significantly in the microstructure at the temperature. Mechanical properties including yield strength(YS) and ultimate tensile strength(UTS) increase greatly but uniform elongation(UE) decreases slightly as a result of work hardening.

关 键 词：MICROSTRUCTURE PURE Mg MECHANICAL PROPERTIES HOT EXTRUSION 

分 类 号：TG1[金属学及工艺—金属学]