Multi-Objective Optimization of Friction Stir Welding for Aluminum Alloy (2024-T3)

Abstract

In this research, a multi-response optimization based on Taguchi methodis proposed for friction stir welding (FSW) process for (2024-T3)aluminum alloy. Three different shoulder diameters of tools with taperedpin geometry of (12, 14 and 14 mm) with variable rotation speed (710,1000 and 1400 rpm) and welding speed of (40, 56 and 80 mm/min), threedifferent tilting angles of (1, 2 and 3 degree) and three welding directionof (1, 2 and 3 passes). The results of this work showed the singleoptimization by using (Taguchi method) at the optimum condition for thetensile strength and yield strength were (365 MPa) and (258 MPa)respectively; at the parameters: shoulder diameter (14 mm), rotationspeed (1400 rpm), linear speed (40 mm/min), tilting angle ((3°) for tensilestrength and (1°) for yield strength) and welding direction (3 passes). Theresults of multi-response optimization for (FSW) process at the optimumcondition for tensile strength and yield strength were (371 MPa) and (268MPa), respectively; at the parameters: shoulder diameter (14 mm),rotation speed (1400 rpm), linear speed (40 mm/min), tilting angle (3°)and welding direction (3 passes)