Study on anisotropy of microstructure and mechanical properties of AZ31 magnesium alloy fabricated by wire arc additive manufacturing  

作　　者：Dong Ma Chun-jie Xu Jun Tian Shang Sui Can Guo Xiang-quan Wu Zhong-ming Zhang 

机构地区：[1]School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China [2]Xi'an Shechtman Nobel Prize New Materials Institute,Xi'an 710048,China [3]Xi'an Key Laboratory of Advanced Magnesium Alloy Additive Manufacturing and Precision Forming,Xi'an 710048,China [4]MGM Nobel Prize New Materials Co.,Ltd.,Tongchuan 727100,Shaanxi,China

出　　处：《China Foundry》2023年第4期280-288,共9页中国铸造（英文版）

基　　金：support from the International Science and Technology Cooperation Program of Shaanxi Province(No.2023-GHZD-50);Projects of Major Innovation Platforms for Scientific and Technological and Local Transformation of Scientific and Technological Achievements of Xi'an(No.20GXSF0003);Projects of Major Scientific and Technological Achievements Local Transformation of Xi'an(No.2022JH-ZDZH-0039);the Higher Education Institution Discipline Innovation and Intelligence Base of Shaanxi Province(No.S2021-ZCGXYZ-0011).

摘　　要：Based on wire arc additive manufacturing(WAAM)technology,AZ31 magnesium alloy in bulk was successfully fabricated,and its microstructure as well as mechanical properties in different planes were observed and analyzed.The AZ31 magnesium alloy has a similar microstructure in the building direction(Z)and travel direction(X),both of which are equiaxed grains.There are heat-affected zones(HAZs)with coarse grains below the fusion line.The second phase is primarily composed of the Mg17Al12 phase,which is evenly distributed in different directions.In addition,the residual stress varies in different directions.There is no significant difference in the hardness of the AZ31 alloy along the Z and X directions,with the average hardness being 68.4 HV and 67.9 HV,respectively.Even though the specimens’ultimate tensile strength along the travel direction is higher in comparison to that along the building direction,their differences in elongation and yield strength are smaller,indicating that the anisotropy of the mechanical properties of the material is small.

关 键 词：magnesium alloy wire arc additive manufacturing ANISOTROPY MICROSTRUCTURE mechanical properties 

分 类 号：TG146.22[一般工业技术—材料科学与工程]