Effect of Gd addition on mechanical and microstructural properties of Mg-xGd-2.6Nd-0.5Zn-0.5Zr cast alloys

作     者：Liang Zhan Yi-zhi Le Zhi-jun Feng Yan-chun Lou Ming Ruan Hua-wen Li Liang Zhan;Yi-zhi Le;Zhi-jun Feng;Yan-chun Lou;Ming Ruan;Hua-wen Li

作者机构：Key Lab of Electromagnetic Processing of MaterialsNortheastern UniversityShenyang 110819China State Key Laboratory of Light Alloy Casting Technology for High-end EquipmentShenyang Research Institute of Foundry Co.Ltd.Shenyang 110022China AECC Zhongchuan Transmission Machinery Co.Ltd.Changsha 410200China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2020年第17卷第3期

页      面：212-218页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Mg-xGd-Nd-Zn-Zr alloys mechanical properties microstructure Gd addition 

摘      要：The Mg-xGd-2.6Nd-0.5Zn-0.5Zr(x=0,3.0,4.5 and 6.0,wt.%)alloys were prepared by gravity casting and then T6 *** of the alloy were observed using optical microscopy and scanning electron *** show that the as-cast alloys contained network Mg3Gd phases,blocky and needle-like Mg12(Nd,Gd)*** a(Zr)particle inclusions in the a(Mg)matrix are also *** of the secondary phases decreases as Gd content *** test results show that the tensile and yield strengths of all the alloys increase as Gd content increases under the as-cast and T6 conditions,but the elongation exhibits the opposite *** blocky Mg12(Nd,Gd)phases appear and act as crack initiator and deteriorates the experimental alloys’ductility with the increase of Gd content,especially as Gd content increases to 6.0 wt.%,so the Mg-6.0Gd-2.6Nd-0.5Zn-0.5Zr alloy has the lowest elongation value compared to the other alloys *** T6 treatment,the Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr alloy exhibits the optimal mechanical properties both at room temperature and 250℃.