Mechanical Properties and Corrosion Resistance of Friction Stir Welded Dissimilar Aluminum Alloys 2219 to 5083

Abstract:

In this paper, 6 mm thickness dissimilar aluminium alloys of 5083 (H321) and 2219 (O) butt joints were fabricated successfully by friction stir welding process. The quality joints were obtained for the welding parameters of 35 mm/min and 650 rpm with the shoulder diameter to pin diameter ratio as 3. Macrostructure study shows that the interface between the weld nugget and TMAZ is smooth and clear with a flow arm extending towards the top surface of the weld in the 2219 side. The boundary on the 5083 side between the weld nugget and the TMAZ was irregular. The obtained joint efficiency is around 92.57% based on the UTS of the softer material (AA2219). The tensile test results showed that the specimens failed in the heat affected zone of the softer base material 2219. The hardness values in the stirred zone are higher than the softer base material of alloy 2219. The friction stir welded dissimilar joint 2219-5083 exhibited better general corrosion characteristics than the 2219-2219 weld and 2219 base material.

• Periodical: Applied Mechanics and Materials (Volumes 813-814)
• Pages: 203-207
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.813-814.203
• Online since: November 2015
• Authors: M. Koilraj*, A. Sathesh Kumar, D.L. Belgin Paul, S.R. Koteswara Rao
• Keywords: Corrosion, Dissimilar Aluminium Alloys, Friction Stir Welding, Mechanical Property

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