Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys

Amir Hossein Baghdadi; Zainuddin Sajuri; Nor Fazilah Mohamad Selamat; Mohd Zaidi Omar; Yukio Miyashita; Amir Hossein Kokabi

doi:10.1007/s12613-019-1834-5

Volume 26 Issue 10

Oct. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(10): 1285-1298

Amir Hossein Baghdadi, Zainuddin Sajuri, Nor Fazilah Mohamad Selamat, Mohd Zaidi Omar, Yukio Miyashita, and Amir Hossein Kokabi, Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys, Int. J. Miner. Metall. Mater., 26(2019), No. 10, pp. 1285-1298. https://doi.org/10.1007/s12613-019-1834-5

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Amir Hossein Baghdadi, Zainuddin Sajuri, Nor Fazilah Mohamad Selamat, Mohd Zaidi Omar, Yukio Miyashita, and Amir Hossein Kokabi, Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys, Int. J. Miner. Metall. Mater., 26(2019), No. 10, pp. 1285-1298. https://doi.org/10.1007/s12613-019-1834-5

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Research Article

Effect of intermetallic compounds on the fracture behavior of dissimilar friction stir welding joints of Mg and Al alloys

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Corresponding authors:
Amir Hossein Baghdadi E-mail: baghdadi.amirhossein@gmail.com

Zainuddin Sajuri E-mail: zsajuri@ukm.edu.my
Received: 12 November 2018; Revised: 5 April 2019; Accepted: 9 April 2019

Abstract

Abstract

Joining Mg to Al is challenging because of the deterioration of mechanical properties caused by the formation of intermetallic compounds (IMCs) at the Mg/Al interface. This study aims to improve the mechanical properties of welded samples by preventing the fracture location at the Mg/Al interface. Friction stir welding was performed to join Mg to Al at different rotational and travel speeds. The microstructure of the welded samples showed the IMCs layers containing Al₁₂Mg₁₇ (γ) and Al₃Mg₂ (β) at the welding zone with a thickness (< 3.5 µm). Mechanical properties were mainly affected by the thickness of the IMCs, which was governed by welding parameters. The highest tensile strength was obtained at 600 r/min and 40 mm/min with a welding efficiency of 80%. The specimens could fracture along the boundary at the thermo-mechanically affected zone in the Mg side of the welded joint.
- aluminum alloy;
- magnesium alloy;
- intermetallic compounds;
- dissimilar welded joint;
- friction stir welding

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