Optimization and Characterization of Friction Stir Welding Parameters for Aluminium Alloys 6061 and 6081Pages 138-143
Abstract: The research explores the impact of Friction Stir Welding (FSW) parameters on tensile strength and microhardness of AA-6061 and AA-6081 aluminium alloys. Utilizing a vertical milling machine and a cylindrical tool, FSW trials were conducted on 100 x 100 x 6 mm plates, employing various combinations of tool rotation speed, feed rate, and depth of cut. Tensile strength and microhardness were measured post-welding. Analysis revealed that decreasing tool rotation speed improved tensile strength, while decreased feed rates led to reduced tensile strength. Microhardness exhibited a similar trend with lower rotation speed, feed rate, and depth of cut resulting in increased values. Microstructural examination highlighted the dominance of aluminium alloy in the stir zone of welded joints. The study underscores the intricate relationship between FSW parameters and mechanical properties, offering insights for optimizing welding processes in aluminium alloys. These findings contribute to the advancement of FSW techniques and facilitate the development of robust welded joints with enhanced mechanical properties. Keywords: Friction Stir Welding, Microstructure, Nugget, Aluminium, Plastisize, Microhardness
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