Desirability Optimization of Mechanical Behavior for Friction Stir welded Aluminium Alloy (AA2024-T3)

In this research, a multi-response optimization based on Taguchi methodis proposed for friction stir welding (FSW) process for (2024-T3) aluminium alloy. Three different shoulder diameters of tools with tapered pin 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), three different tilting angle of (1, 2 and 3 degree) and three welding direction of (1, 2 and 3 passes). The results of this work showed the single optimization by using (Taguchi method) at the optimum condition for toughness were (124.174MPa.m1/2) at: shoulder diameter (14 mm), rotation speed (1400 rpm), linear speed (40 mm/min), tilting angle (3 degree) and welding direction (3 passes); and for bending strength were (7.62 MPa) at: shoulder diameter (14 mm), rotation speed (1400 rpm), linear speed (56 mm/min), tilting angle (3 degree) and welding direction (3 passes). The results of multi-response optimization for (FSW) process at the optimum condition for toughness and bending strength were (100.78 MPa.m1/2) and (7.68 MPa), respectively; at the parameters: shoulder diameter (14 mm), rotation speed (1400 rpm), linear speed (56 mm/min), tilting angle (3 degree) and welding direction (3 passes).