Microstructure and Mechanical Properties of Dissimilar Joint of Aluminium Alloy and Pure Copper by Friction Stir Welding

被引：0

作者：

Meng Q. ^{[1
]}

Che Q. ^{[2
,3
]}

Wang K. ^{[2
,3
]}

Zhang K. ^{[1
]}

Wang W. ^{[2
,3
]}

Huang L. ^{[2
,3
]}

Peng P. ^{[2
,3
]}

Qiao K. ^{[2
,3
]}

机构：

[1] Beijing FSW Technology Co., Ltd., Beijing

[2] School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an

[3] National and Local Joint Engineering Research Center for Functional Materials Processing, Xi'an

来源：

Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Aluminum-copper dissimilar materials; Friction stir welding; Mechanical properties; Microstructure;

D O I：

10.11896/cldb.18050184

中图分类号：

学科分类号：

摘要：

The dissimilar joint of 6061-T6 aluminum alloy and pure copper were successfully carried out by friction stir welding (FSW) in this work. The results showed that high-quality welded joint can be obtained when the pure copper was placed at the retreating side, and stir pin was placed 0.5 mm offset the aluminum alloy. The regional lamellar structure was formed in terms of intensive metal flow of aluminum alloy and pure copper at the joint interface. In addition, the grains were refined in the nugget zone. Several intermetallic compounds like Al2Cu, AlCu and Al4Cu9 were generated in the joint, presenting a formation mechanism of solid-state diffusion. Additionally, the homogeneity of microstructure and intermetallic compounds exhibited a great impact on the distribution of microhardness. The lowest hardness was located at the heat affected zone of the aluminum alloy side, showing the effect of thermal softening. The ultimate tensile strength of the joint reached 75.5% of that of pure copper. The fracture position was located in the heat affected zone of aluminum alloy side, and the tensile fracture surface featured the mixed ductile-brittle fracture. © 2019, Materials Review Magazine. All right reserved.

引用

页码：2030 / 2034

页数：4

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