Effect of double-side welding on the microstructural characteristics and mechanical performance of dissimilar AA6061-AA5052 aluminium alloys

Rajesh Kannan, A. and Siva Shanmugam, N. and Palguna, Yasam and Girinath, B. and Lee, Wonjoo and Yoon, Jonghun (2023) Effect of double-side welding on the microstructural characteristics and mechanical performance of dissimilar AA6061-AA5052 aluminium alloys. Materials Letters, 331. ISSN 0167-577X

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Abstract

In this study, cold metal transfer (CMT) based double-side welding process was employed to weld AA5052-H32 and AA6061-T6 plates having a thickness of 6 mm. The microstructure and mechanical integrity of the weldment was examined systematically. Symmetric and defect free joint with full penetration was achieved. The multiple heating and cooling cycles during CMT welding did not affect the weldment while the microstructure comprised of columnar and equiaxed dendrites and the heat affected zone (HAZ) width was < 50 µm at all interfaces. Precipitates such as Al3Mg2, Mg2Si, and α-Al(FeMn)Si were observed in the fusion zone. Intergranular Al-Si eutectic structure along with few microliquefaction cracks were noticed in the α-Al matrix. The maximum tensile properties for double-side welded joint were 214 MPa and 12.30 % with a joint efficiency of 70.68 %. Tensile specimens underwent ductile fracture in the weaker AA5052-H32 side with confined plastic deformation.

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IITH Creators:

IITH Creators	ORCiD
Rajesh Kannan, A.	http://www.orcid.org/0000-0001-8038-1795

Item Type:

Article

Uncontrolled Keywords:

Aluminum alloys; Cold Metal Transfer; Double-side welding; Mechanical properties; Microstructure; AA6061-T6; Cold metal transfers; Double sides; Double-side welding; Mechanical integrity; Mechanical performance; Microstructural characteristics; Symmetrics; Welding process; Weldments; Binary alloys; Ductile fracture; Eutectics; Heat affected zone; Textures; Welding; Aluminum alloys

Subjects:

Materials Engineering > Materials engineering
Materials Engineering > Composite materials

Divisions:

Department of Mathematics

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

16 Aug 2023 11:21

Last Modified:

16 Aug 2023 11:21

URI:

http://raiithold.iith.ac.in/id/eprint/11553