Influence of aging on microstructure and mechanical properties of AZ80 and ZK60 magnesium alloys  

时效处理对AZ80和ZK60镁合金微观组织和力学性能的影响(英文)

作　　者：李艳[1] 张治民[1] 薛勇[1,2] 

机构地区：[1]中北大学材料科学与工程学院,太原030051 [2]北京航空航天大学机械工程与自动化学院,北京100191

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第4期739-744,共6页中国有色金属学报（英文版）

基　　金：Projects(50735005,50605059)supported by the National Natural Foundation of China;Project(2007021026)supported by the Shanxi Provincial Science Foundation for Youths, China;Project(20081027)supported by the Development for Science and Technology in Higher Educational Institutes, China

摘　　要：The effect of aging on the microstructure and mechanical properties of AZ80 and ZK60 wrought magnesium alloys was studied with optical microscope and mechanical testers. The results demonstrate that both the tensile strength and elongation of AZ80 alloy increase firstly and then decrease as the aging temperature rises, the peak values appear when the aging temperature is 170 ℃ The hardness of ZK60 alloy increases firstly and then decreases as the aging temperature rises, and the hardness reaches its peak value at 170 ℃. However, the toughness of the alloy is just the opposite. Moreover, ZK60 alloy has good performances in both impact toughness and other mechanical properties at the aging temperature from 140 ℃ to 200 ℃.借助光学显微镜和力学性能测试仪器,研究时效处理对AZ80和ZK60锻造镁合金的微观组织和力学性能的影响规。结果表明:AZ80镁合金的抗拉强度和伸长率随着时效温度的升高呈现先增加后下降的趋势,当时效温度为170 °C时,其抗拉强度和伸长率达到最大;ZK60镁合金的硬度随着时效温度的升高呈现先增加后下降的趋势,当时效温度为 170 °C时,其硬度达到最大,而其韧性正好呈现相反的趋势。此外,在140 200 °C的时效温度范围内,ZK60镁合金比AZ80镁合金具有更好的冲击韧性与其他力学性能。

关 键 词：AZ80 magnesium alloy ZK60 magnesium alloy AGING MICROSTRUCTURE mechanical properties 

分 类 号：TG166.4[金属学及工艺—热处理]