Effects of Y on mechanical properties and damping capacity of ZK60 magnesium alloys  

作　　者：王敬丰 高珊 赵亮 梁浩 胡耀波 潘复生 

机构地区：[1]National Engineering Research Center for Magnesium Alloys,Chongqing University [2]Institute of System Engineering,China Academy of Engineering Physics

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第B07期366-370,共5页中国有色金属学报（英文版）

基　　金：Project(10876045)supported by the National Natural Science Foundation Commission of China and China Academy of Engineering Physics;Project(50725413)supported by the National Natural Science Foundation of China;Project(2007CB613704)supported by the National Basic Research Program of China;Project(CSTS2008AB4114)supported by Chongqing Science and Technology Commission(CQ CSTC)

摘　　要：The microstructure,mechanical properties and damping capacity of ZK60-xY(x=0,1.5%,2.5%,4.0%,mass fraction) magnesium alloys were investigated by using the optical microscope(OM),X-ray diffractometer(XRD),universal tensile testing machine and dynamic mechanical analyzer(DMA).The mechanisms for damping capacity of referred alloys were discussed by Granato-Lücke theory.The results show that Y additions remarkably reduce grain size(the average grain size is 21.6,13.0,8.6 and 4.0μm,respectively),and the tensile properties are enhanced with grain refining(the yield tensile strength increases to 292 MPa from 210 MPa and ultimate tensile strength increases to 330 MPa from 315 MPa).For the ZK60-xY(x=0,1.5%,4.0%)alloys,the damping capacity decreases with the increase of Y content.However,for the ZK60-xY(x=2.5%)alloy,the damping capacity improves abnormally,which is possibly related to the formation of Mg3Y2Zn3(W)FCC phase in this alloy.The microstructure,mechanical properties and damping capacity of ZK60-xY（x=0,1.5%,2.5%,4.0%,mass fraction） magnesium alloys were investigated by using the optical microscope（OM）,X-ray diffractometer（XRD）,universal tensile testing machine and dynamic mechanical analyzer（DMA）.The mechanisms for damping capacity of referred alloys were discussed by Granato-Lücke theory.The results show that Y additions remarkably reduce grain size（the average grain size is 21.6,13.0,8.6 and 4.0μm,respectively）,and the tensile properties are enhanced with grain refining（the yield tensile strength increases to 292 MPa from 210 MPa and ultimate tensile strength increases to 330 MPa from 315 MPa）.For the ZK60-xY（x=0,1.5%,4.0%）alloys,the damping capacity decreases with the increase of Y content.However,for the ZK60-xY（x=2.5%）alloy,the damping capacity improves abnormally,which is possibly related to the formation of Mg3Y2Zn3（W）FCC phase in this alloy.

关 键 词：magnesium alloys MICROSTRUCTURE mechanical property damping capacity Granato-Lücke Theory 

分 类 号：TG146.22[一般工业技术—材料科学与工程]