Effect of aging temperature on precipitation behavior and mechanical properties of extruded AZ80-Ag alloy
Effect of aging temperature on precipitation behavior and mechanical properties of extruded AZ80-Ag alloy
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DOI：
10.1016/j.jallcom.2015.06.126
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发表时间：
2015-10
影响因子：
6.2
通讯作者：
Yu Shilun;Yonghao Gao;Chuming Liu;Xiuzhu Han
中科院分区：
文献类型：
--
作者：
Yu Shilun;Yonghao Gao;Chuming Liu;Xiuzhu Han
系统研究了AZ 80-Ag合金的时效行为及其组织随时效温度的变化规律。结果表明，Ag的加入可显著提高AZ 80镁合金的时效硬化响应，提高峰值硬度，同时缩短峰值出现时间。在不同条件下观察到两种连续析出相和三种不连续析出相。连续相与不连续相的体积分数比随时效温度的升高而增大。当在175 °C时效38 h时，整个组织被不连续的析出物侵入，并且达到428 MPa的极限拉伸强度。
Aging behavior and related microstructural evolution of AZ80-Ag alloy as a function of aging temperature are systematically investigated. Results show that Ag addition can significantly enhance the age-hardening response of AZ80, improving its peak hardness and shortening the time to reach the peak simultaneously. Two kinds of continuous precipitates and three kinds of discontinuous precipitates are observed under varying conditions. The volume fraction ratio of continuous precipitates to discontinuous precipitates increases with increasing aging temperature. When aged at 175 °C for 38 h, the whole microstructure is invaded by discontinuous precipitates and an ultimate tensile strength of 428 MPa is achieved.