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