The microstructure and mechanical properties of AZ80 alloy with different Gd contents were investigated.The results reveal that a minor addition of Gd could lead to a change in the type of second phase particles from Al-Mn to Al-Gd-Mn,and the primary rare earth phase is Al8GdMn4 instead of Al2Gd in the AZ80-0.3Gd alloy.New strip-like Al3Gd and block-shaped Al2Gd phases are formed successively with the increase of Gd content.Al2Gd phase becomes the dominating rare earth phase in AZ80-2.0Gd and AZ80-4.0Gd alloys.Tensile test indi-cates that the mechanical properties are improved obvi-ously with a proper Gd content.However,excessive Gd addition results in the decrease of mechanical properties due to the formation of coarse block-shaped Al2Gd phase.AZ80-0.9Gd alloy exhibits the optimal mechanical prop-erties among all the experimental alloys,in which the ultimate tensile strength(UTS),yield strength(YS)and elongation are 210,130 MPa and 8.2％,respectively.

Nan Jiang;Ling-Gang Meng;Xing-Guo Zhang;Lei Chen;Can-Feng Fang;Hai Hao

School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China

稀有金属（英文版）

[1]Nan Jiang;Ling-Gang Meng;Xing-Guo Zhang;Lei Chen;Can-Feng Fang;Hai Hao-.Microstructure and mechanical properties of Gd-modified AZ80 magnesium alloys)[J].稀有金属（英文版）,2022(12):4194-4200

Al8GdMn4,Al3Gd,0Gd

Microstructure,mechanical,properties,modified,AZ80,magnesium,alloys,microstructure,different,contents,were,investigated,results,reveal,that,minor,addition,could,lead,change,type,second,particles,from,primary,rare,earth,is,instead,Al2Gd,New,strip,like,block,shaped,phases,formed,successively,increase,becomes,dominating,Tensile,test,indi,cates,improved,obvi,ously,However,excessive,decrease,due,formation,coarse,9Gd,exhibits,optimal,among,experimental,which,ultimate,tensile,strength,UTS,yield,YS,elongation,respectively

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