Formability, microstructure and mechanical properties of nano-treated Al-Zn-Mg-Cu alloy fabricated by wire arc additive manufacturing

被引：0

作者：

Tian, Rui ^{[1
,3
]}

Jiang, Zhe ^{[2
]}

Liu, Jun ^{[1
,3
]}

Liu, Weiqing ^{[1
]}

Chi, Yuanqing ^{[2
]}

Zhang, Yongkang ^{[2
]}

机构：

[1] China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangdong Provincial Key Laboratory of Material Joining and Advanced Manufacturing, Guangzhou

[2] School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou

[3] School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2024年 / 45卷 / 08期

关键词：

Al-Zn-Mg-Cu alloy; formability; mechanical properties; microstructure; nano-treating; wire arc additive manufacturing;

D O I：

10.12073/j.hjxb.20231216001

中图分类号：

学科分类号：

摘要：

Wire arc additive manufacturing(WAAM) was utilized to fabricate the nano-treated Al-Zn-Mg-Cu alloy. Effects of fabrication parameters on WAAM formability are systematically investigated. The results show that the nano-treated Al-Zn-Mg-Cu alloy is well formed by alternative path under the following parameters: welding current 190 A, welding speed 350 mm/min, dwell time 90 s. Post-deposition heat treatment is employed to further modify the microstructure and the mechanical performance. The WAAMed Al-Zn-Mg-Cu alloys at both as-deposited and heat-treated states exhibit homogeneous microstructure composed of fine equiaxed grains without preferred orientation. T6 heat treatment significantly improves the microhardness and mechanical properties of the as-deposited alloy. The microhardness of the T6 treated alloy reaches 178.3 HV, which is 61% higher than that of the as-deposited sample. The ultimate tensile strength, yield strength, elongation of the T6 treated alloy along horizontal and vertical directions are 469.7(±5.1) MPa, 366.3(±1.4) MPa, 6.4 (±0.4) % and 454.3(±18.8) MPa, 364.7(±16.7) MPa, 5.9 (±0.5)% respectively, demonstrating that the WAAMed nano-treated Al-Zn-Mg-Cu alloy has excellent mechanical isotropy. © 2024 Harbin Research Institute of Welding. All rights reserved.

引用

页码：110 / 120

页数：10

共 26 条

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