Microstructures and mechanical properties of the age hardened Mg-4.2Y-2.5Nd-1Gd-0.6Zr(WE43)microalloyed with Zn  

作　　者：Y.H.Kang D.Wu R.S.Chen E.H.Han 

机构地区：[1]State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,62 Wencui Road,Shenyang 110016,China [2]University of the Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Magnesium and Alloys》2014年第2期109-115,共7页镁合金学报（英文）

基　　金：This work was funded by the National Basic Research Program of China(973 Program)through project No.2013CB632202.

摘　　要：The effect of trace addition of 0.2 wt.%Zn on the microstructures and mechanical properties of the age-hardening Mg-4.2Y-2.5Nd-1Gd-0.6Zr(wt.%)(WE43)alloy has been investigated.As compared with the WE43 alloy after solid solution treatment at 525 ℃,the block-like Zn-Zr phase was still observed in the WE43-0.2Zn alloy.However,the time for WE43-0.2Zn alloy to get peak hardness at 250 ℃ was two hours,a half earlier than that in WE43 alloy,meaning a accelerated age precipitation kinetics has been achieved due to the addition of 0.2 wt.%Zn.Microalloyed with 0.2 wt.%Zn enhanced the ultimate tensile strength(UTS)slightly and ductility significantly both in the solutionized and peak aged condition.The enhancement in strength and ductility is possible associated with the larger volume fraction of precipitation phases due to a reduction of the solubility of rare earth elements(RE)in theα-Mg matrix,the larger aspect ratio(length to width)of precipitates and a decrease in stacking fault energy by addition of Zn.

关 键 词：Magnesium alloy MICROALLOYING MICROSTRUCTURES Mechanical properties 

分 类 号：TG1[金属学及工艺—金属学]