Transactions of Materials and Heat Treatment

Title：Influence of temperature and friction stir processing on mechanical properties of magnesium alloy AZ31

Authors： Yang Xiaomin Li Mingzhu Dong Feng Liu Shoufa

Unit： Yongcheng Vocational College Xijing University Xi′an Thermal Power Research Institute

KeyWords： friction stir processing magnesium alloy AZ31 work hardening rate mechanical properties tensile twin crystals compression twin crystals basal slip

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2017,42(7):169-172

Abstract：

The friction stir processing (FSP) experiment was conducted for magnesium alloy AZ31 extrusion profile at different temperatures, and the influences of temperature and FSP on work hardening rate and mechanical properties of samples were investigated by means of optical microscope and sample stretching equipment. The results show that with the increase of temperature, the yield strength and ultimate tensile strength at the base material and the stirring zone material are reduced and that of the base material is reduced greatly. However, the total elongation and uniform elongation at the stirring zone material are higher than that of the base material, and the maximum values at 100 ℃ are up to 35% and 33.5% respectively. But the work hardening rate at the stirring zone material remains at a high level at room temperature and 100 ℃, and the work hardening rate at the base material decreases greatly with the increasing of stain at all temperatures. Furthermore, the tensile strain at the base material is dominated by the non-basal slip and compression twin crystals, while the tensile strain at the stirring zone material is dominated by the basal slip and tensile twin crystals.

Funds：

陕西省教育厅专项科研计划项目(15JK2172); 西京学院科研基金项目(XJ140228)

作者简介：杨晓敏(1983-), 女, 硕士, 讲师，E-mail：540348719@qq.com；通讯作者：李明珠(1953-), 男, 学士, 教授，E-mail:304279656@qq.com

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