Transactions of Materials and Heat Treatment

Title：Influence of extrusion temperature on microstructure and properties of new magnesium alloy for automobile

Authors： Bai Yun

Unit： Chongqing Industry Polytechnic College

KeyWords： magnesium alloy Mg-Al-Zn-Ti extrusion temperature grain size mechanical property microstructure

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2018,43(4):146-148

Abstract：

To study the influences of extrusion temperature on microstructures and properties of new type magnesium alloy Mg-Al-Zn-Ti for automotive, the extrusion tests of new magnesium alloy Mg-Al-Zn-Ti for automotive were conducted at five different extrusion temperatures, and the microstructures and mechanical properties were tested and analyzed. The results show that with the increasing of extrusion temperature from 230 ℃ to 350 ℃, the average grain size of alloy decreases first and then increases, both tensile strength and yield strength increase first and then decrease, while the elongation after fraction decreases first and then increases within a smaller range. Furthermore, at the extrusion temperature of 320 ℃, the grain size of alloy decreases to the smallest, and the mechanical properties reach the best. Comparing with the alloy extruded at 230 ℃, the average grain size is reduced by about 9 μm, and the tensile strength and yield strength are increased by 31 and 32 MPa, respectively. Therefore, the optimal extrusion temperature of new magnesium alloy Mg-Al-Zn-Ti for automotive is preferably 320 ℃.

Funds：

重庆市教委科学技术研究项目（KJ1503105）

白云（1983-），女，硕士，讲师；E-mail：33941088@qq.com

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