Optimal Design of Friction Stir Welding Process to Improve Tensile Force of the Joint of A6005 Extrusion

An aluminum alloy is widely used in various fields of industries such as aerospace, shipbuilding, automotive, and railway vehicles, and gas metal Arc Welding (GMAW) technique has been applied to make the aluminum products. Recently, friction stir welding (FSW) method was developed and known to have many benefits compared to the classical GMAW technique. In this study, three important welding parameters of FSW process including the rotating speed, welding speed, and tilting angle are optimized to increase the tensile force of the joints of friction stir welded A6005 alloy. The objective function is estimated according to the response surface analysis method, and the optimum values of the design parameters are determined by using Sequential Quadratic Programming (SQP) algorithm. The optimization results are verified by comparing the tensile force of FSW specimens before and after optimization.

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