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

被引：22

作者：

Cai, Xiaoyu ^{[1
]}

Chen, Fukang ^{[1
]}

Dong, Bolun ^{[1
]}

Lin, Sanbao ^{[1
]}

Yang, Chunli ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2024年 / 12卷 / 08期

基金：

中国国家自然科学基金;

关键词：

GTA Additive manufacturing; AZ91D magnesium alloy; Microstructure; Mechanical properties; MG-AL ALLOYS; DISCONTINUOUS PRECIPITATION; CHEMICAL NANOANALYSIS; FORMABILITY; DEPOSITION; MORPHOLOGY; AL8MN5;

D O I：

10.1016/j.jma.2022.11.018

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Wire arc additive manufacturing offers advantages in producing large metal structures. The 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 system. However, there is little research on GTA-WAAM for casting magnesium alloy. This study investigates the microstructural characteristics and mechanical properties of AZ91D magnesium alloy (AZ91D-Mg) deposited by GTA-WAAM. Single-pass multilayer thin-walled components were successfully fabricated. The results show that equiaxed grains dominate the microstructure of the deposited samples. During 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 cycle. The mechanical properties in the vertical and horizontal directions are similar, showing higher overall mechanical properties than the casting parts. The 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 (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University

引用

页码：3180 / 3192

页数：13

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