Effect of Operational Parameters on AA2014 Friction Stir Weldments Using Plain Cylindrical Tool

Abstract:

Aluminum alloys are mostly used for high strength structural applications utilized in aircraft structure, trucks body, military vehicles, bridges and weapons manufacture. Conventional fusion welding of aluminum alloy produces porosity and hot cracks in the welded joint due to incorrect selection of consumables and parameters, which may lead to lower weld toughness and defects in the mechanical properties. The mostly adopted method for welding AA 2014-T6 is solid state joining process. Friction stir welding (FSW) is an emerging solid state of joining process which avoids bulk melting of the basic material, hot cracking and porosity. The welding parameters and tool pin profile play a major role in deciding weld quality. In this investigation, an attempt has been made to understand the various influences of tool rotational speed, welding speed and pin profile of the tool on friction stir processed (FSP) zone formation in joining of AA2014 aluminum alloy. High Carbon High Chromium steel tool of plain cylindrical pin profile is used to fabricate the joints. The average grey relation grade for each level of each factor are calculated and it was found that the optimal settings of the levels of factors Tool rotation speed (A), Weld speed (B) and Tilt angle (C) are A1-B3-C3. The findings from these investigations will be presented and discussed.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 216-223
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.216
• Online since: July 2014
• Authors: Nallavelli Ramesh*, K. Palaksha Reddy
• Keywords: Aluminium Alloy, Friction Stir Weld, Rotational Speed, Tilt Angle, Welding Speed

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