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作 者:Zheng Tian Qiang Yang Kai Guan Zhan-Yi Cao Jian Meng
机构地区:[1]Key Laboratory of Automobile Materials of Ministry of Education,Department of Materials Science and Engineering,Jilin University,Changchun,130025,China [2]State Key Laboratory of Rare Earth Resources Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022,China
出 处:《Rare Metals》2021年第8期2188-2196,共9页稀有金属(英文版)
基 金:financially supported by the National Natural Science Foundation of China(No.51701200);the Scientific and Technological Developing Scheme of Jilin Province(No.20200801048GH)。
摘 要:Microstructures and mechanical properties of Mg-4.5 Y-2.5 Nd-1.0 Gd-0.5 Zr-xZn(x=0,0.5,1.0,and 1.5;wt%)alloys under as-cast and peak-aged states were investigated in this work.The results indicate that the intermetallic phase components are closely dependent on Zn content.Under as-cast state,the dominant eutectic phase is Mg5 RE in the alloys with 0 wt%and 0.5 wt%Zn additions while Mg5 RE,18 R-and 14 H-LPSO(long period stacking ordered)phases in the alloys with 1.0 wt%and1.5 wt%Zn additions.After solution and peak-aging,the highest strength and hardness were obtained on the alloy with 0.5 wt%Zn addition.Transmission electron microscopy(TEM)characterizations revealed that there are denser and finer precipitates on basal(β’)and prismatic(γ’)planes,respectively.Therefore,the excellent mechanical performance of the alloy with 0.5 wt%Zn addition is mainly due to precipitation strengthening and grain boundary strengthening.
关 键 词:Magnesium alloy Intermetallic phase PRECIPITATES Mechanical property
分 类 号:TG146.22[一般工业技术—材料科学与工程]
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