Transactions of Materials and Heat Treatment

Title：Effect of high pressure torsion on microstructure and mechanical properties of extruded magnesium alloy ZK60

Authors： Xia Xianming1 Xue Kemin2 Li Ping2 Wei Baoli1

Unit： (1.School of Mechanical Engineering University of Science and Technology of Anhui Fengyang 233100 China 2.School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China)

KeyWords： magnesium alloy ZK60 HPT microhardness mechanical properties grain refining

ClassificationCode：TG146.22

year,vol(issue):pagenumber：2018,43(5):0-0

Abstract：

Through high pressure torsion test on magnesium alloy ZK60 billet with a certain heightdiameter ratio, the influences of tension on the microstructure and mechanical properties of magnesium alloy ZK60 were analyzed. Through tensile test, fracture scanning and hardness measure of deformed magnesium alloy ZK60 along the radius direction, the reasons for changes of mechanical properties and hardness distribution, and the fracture mechanism of alloy were analyzed. The analysis results show that the high pressure torsion could effectively refine the grain, improve the mechanical properties and tensile strength and enhance the plastic deformation capability. The hardness of deformed region increases with the increasing of torsion cycles of die and presents “V” pattern distribution along the radius direction in the specified pressure and speed conditions. In the same condition of high pressure torsion, the hardness presents “bowl” pattern distribution in different areas and the farther away from the center of specimen, the hardness increases more significantly, but the change is uneven.

Funds：

安徽高校自然科学研究重点项目（KJ2016A179）

作者简介：夏显明（1970-），男，硕士，副教授 Email：353657279@qq.com

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