Effect of solidification mode on microstructure evolution and properties of magnesium alloy with long-period stacking ordered phase  

作　　者：Hao Li Hong-mei Chen Xu Zhang Qian-hao Zang Jing Zhang Di Feng Yan-xin Qiao Yu-hang Guo 

机构地区：[1]School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang,212100,Jiangsu,China [2]School of Metallurgy and Materials Engineering,Jiangsu University of Science and Technology,Suzhou,215600,Jiangsu,China

出　　处：《Journal of Iron and Steel Research International》2024年第5期1127-1138,共12页

基　　金：supported by Postgraduate Research&Practice Innovation Program of Jiangsu Province(Project No.KYCX22_3792);Basic Science(Natural Science)Research General Project of Jiangsu Province Universities,China(22KJB430003).

摘　　要：The solidification methods of electromagnetic stirring(EMS)and non-electromagnetic stirring were employed to prepare Mg–6Gd–3Y–xZn–0.6Zr(x=1,1.5,2,3)alloys.The evolution of alloy microstructures and the changes in properties were analyzed for different Zn contents.It has been observed that in alloys without electromagnetic stirring,as the Zn content increases,the alloy structure gradually refines.The primary second phase transitions from Mg5RE phase to long-period stacking ordered(LPSO)phase,resulting in improved hardness and elongation.In alloys subjected to electromagnetic stirring,there is a relatively higher content of the second phase,primarily consisting of LPSO phase.After applying electromagnetic stirring,the quantity and the type of LPSO phase in the alloy change.The alloy structure becomes more uniform with electromagnetic stirring,resulting in increased hardness and reduced hardness gradients within the grains.The mechanical properties of alloys with electromagnetic stirring are superior to those without electromagnetic stirring.

关 键 词：Rare earth magnesium alloy LPSO phase Electromagnetic stirring CASTING PROPERTY 

分 类 号：TG146.22[一般工业技术—材料科学与工程]