Microstructure and mechanical properties of GTA-based wire arc additive manufactured AZ91D magnesium alloy

作     者：Xiaoyu Cai Fukang Chen Bolun Dong Sanbao Lin Chunli Yang Xiaoyu Cai;Fukang Chen;Bolun Dong;Sanbao Lin;Chunli Yang

作者机构：State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2024年第12卷第8期

页      面：3180-3192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）] 

基　　金：supported by the National Natural Science Foundation of China[Grant Nos.52275324 and 51975148] the Fundamental Research Funds for the Central Universities[Grant No.FRFCU5710051321] 

主　　题：GTA Additive manufacturing AZ91D magnesium alloy Microstructure Mechanical properties 

摘      要：Wire arc additive manufacturing offers advantages in producing large metal *** current research on GTA-based wire arc additive manufacturing(GTA-WAAM)of magnesium alloys is focused on deformed magnesium alloys,mainly on the Mg-Al alloy ***,there is little research on GTA-WAAM for casting magnesium *** study investigates the microstructural characteristics and mechanical properties of AZ91D magnesium alloy(AZ91D-Mg)deposited by ***-pass multilayer thin-walled components were successfully *** results show that equiaxed grains dominate the microstructure of the deposited *** the remelting process,the precipitated phases dissolve into the matrix,and they precipitate and grow from the matrix under the thermal effect of the subsequent thermal *** mechanical properties in the vertical and horizontal directions are similar,showing higher overall mechanical properties than the casting *** average yield strength is 110.5 MPa,the ultimate tensile strength is 243.6 MPa,and the elongation is 11.7%.The overall hardness distribution in the deposited sample is relatively uniform,and the average microhardness is 59.6 HV_(0.2).