Effect of bonding temperature and heat treatment on microstructure and mechanical property of Mg−6Gd−3Y alloy vacuum diffusion bonded joints

作     者：Ping-yi MA Xu CHEN Xing HAN Zhi-qiang LUO He-li PENG 马平义;陈旭;韩兴;罗志强;彭赫力

作者机构：Shanghai Spaceflight Precision Machinery InstituteShanghai 201600China Shanghai Engineering Technology Research Center of Near-Net Shape Forming for Metallic MaterialsShanghai 201600China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2022年第32卷第7期

页      面：2205-2215页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the Science Innovation Foundation of Shanghai Academy of Spaceflight Technology China (No.SAST2020-117) 

主　　题：Mg−Gd−Y alloy vacuum diffusion bonding post-weld heat treatment bonding interface bonding strength 

摘      要：Diffusion bonding of as-cast Mg−6Gd−3Y magnesium alloy was carried out at temperatures of 400−480℃ with bonding pressure of 6 MPa for 90 *** bonded joints were solution treated at 495℃ for 14 h and then aged at 200℃ for 30 *** and mechanical properties of joints were *** results showed that rare earth elements and their compounds gathering at bonding interface hindered the grain boundary migration crossing bonding *** strength of as-bonded and as-solution treated joints increased firstly and then decreased with the bonding temperature increasing due to the combined effects of grain coarsening and solid-solution ***-bonded and solution-treated joints fractured at matrix except the joint bonded at 400℃,while aged joints fractured at bonding *** highest ultimate tensile strength of 279 MPa with elongation of 2.8%was found in joint bonded at 440℃ with solution treatment followed by aging treatment.