Microstructural evolution and age-hardening behavior of quasicrystal-reinforced Mg-Dy-Zn alloy

作     者：Guang-Li Bi Yu-Xiang Han Jing Jiang Chun-Hong Jiang Yuan-Dong Li Ying Ma 

作者机构：State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 China Key Laboratory of Nonferrous Metal Alloys and Processing Ministry of Education Lanzhou University of Technology Lanzhou 730050 China Lanshi Foundry Co. Ltd. Lanzhou 730050 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2019年第38卷第8期

页      面：739-745页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51301082 and51464031) 

主　　题：Mg-Dy-Zn alloy Microstructure I phase Age-hardening behavior 

摘      要：Microstructural evolution and age-hardening behavior of Mg-2 Dy-6 Zn(at%)alloy during solid-solution and aging treatment were *** microstructure of as-cast alloy is composed of a-Mg,Mg3 DyZn6(Ⅰ)phase,Mg3 Dy2 Zn3(W)phase,Mg(Zn,Dy)phase and a small amount of Mg0.97Zn0.03 *** solid-solution treatment(480℃,12 h),all the I phases and most W phases dissolve into a-Mg matrix and the remainder W phases transform into Mg(Dy,Zn)phase and MgDy3 *** aging treatment,I phase and small amounts of W phases co-precipitate from α-Mg matrix,*** alloy exhibits a peak hardness of HV 77.5 at 200 ℃ for 8 *** excellent age-hardening behavior of alloy is mainly attributed to the co-precipitation strengthening of I and W phases.