Underlying reasons of poor mechanical performance of thick plate aluminum-copper alloy vacuum electron beam welded joints

被引：1

作者：

Chen G. ^{[1
]}

Liu J. ^{[1
]}

Dong Z. ^{[1
]}

Shu X. ^{[1
]}

Zhang B. ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin

来源：

Vacuum | 2020年 / 182卷

基金：

中国国家自然科学基金;

关键词：

Electron beam welding; Eutectic structure; Joint softening; Microstructure; Strengthening phase;

D O I：

10.1016/j.vacuum.2020.109667

中图分类号：

学科分类号：

摘要：

As a light-weight and high-strength structural material, aluminum alloy has become an irreplaceable metal material in the aerospace field. In this paper, 25 mm thick Al-Cu alloy (2A12) was welded by electron beam. The welded joints softened leading to the hardness and tensile strength of the joint decreased. In view of the decrease of mechanical properties, the microstructure in different areas of the welded joint was analyzed. At the same time, the formation mechanism of rosaceous microstructures and eutectic structures was revealed. The influence of impurity elements on the joint was analyzed. In addition, the reason of joint strengthening effect weakening was explained combining with welding temperature field and the precipitation model of competition. © 2020 Elsevier Ltd

引用

共 24 条

[1]

Guo S., Peng Y., Cui C., Et al., Microstructure and mechanical characterization of re-melted Ti-6Al-4V and Al-Mg-Si alloys butt weld, Vacuum, 154, pp. 58-67, (2018)

[2]

Uhart A., Ledeuil J.B., Gonbeau D., Et al., An Auger and XPS survey of cerium active corrosion protection for AA2024-T3 aluminum alloy, Appl. Surf. Sci., 390, pp. 751-759, (2016)

[3]

Wei H.L., Elmer J.W., Debroy T., Origin of grain orientation during solidification of an aluminum alloy, Acta Mater., 115, pp. 123-131, (2016)

[4]

Liu Y., Sun Q., Liu J., Et al., Effect of axial external magnetic field on cold metal transfer welds of aluminum alloy and stainless steel, Mater. Lett., 152, 8, pp. 29-31, (2015)

[5]

Tan Y.B., Wang X.M., Ma M., Et al., A study on microstructure and mechanical properties of AA 3003 aluminum alloy joints by underwater friction stir welding, Mater. Char., 127, pp. 41-52, (2017)

[6]

Liu J., Kou S., Crack susceptibility of binary aluminum alloys during solidification, Acta Mater., 110, pp. 84-94, (2016)

[7]

Samarjyoti K., Microstructure and corrosion properties of diode laser melted friction stir weld of aluminum alloy 2024 T351, Appl. Surf. Sci., 257, 9, pp. 3985-3997, (2011)

[8]

Chang Q., Sun D., Gu X., Et al., Microstructures and mechanical properties of metal inert-gas arc welded joints of aluminum alloy and ultrahigh strength steel using Al-Mg and Al-Cu fillers, J. Mater. Res., 32, 3, pp. 666-676, (2017)

[9]

Amancio-Filho S.T., Camillo A.P.C., Bergmann L., Et al., Preliminary investigation of the microstructure and mechanical behaviour of 2024 aluminium alloy friction spot welds, Mater. Trans., 52, 5, pp. 985-991, (2011)

[10]

Chen G., Liu J., Shu X., Et al., Numerical simulation of keyhole morphology and molten pool flow behavior in aluminum alloy electron-beam welding, Int. J. Heat Mass Tran., 138, 8, pp. 879-888, (2019)

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