Analysis of Tensile Strength of Friction Stir Welding for Aluminum Alloys AA6061 with AA5083 Using Design of Experiment Approach

The analyzing of friction stir welding is applied to AA6061 with AA5083 using design of experiment (DOE) in Minitab to get optimization of the tensile strength. The analyzing was achieved by varying the main parameters as rotational speed by the values 700, 1050, and 1400 R.P.M, linear velocity of 40, 60, and 80 mm/min and pin depth of 3.5, 3.6, and 3.7 mm less than thickness material weld. A total of 11 runs were included corresponding to the designated experimental design. Analysis of variance (ANOVA) software was used to procedure for full factorial design with 1 replicate and 3 center points analysis. The results clarified that the rotational speed parameter is more significant to be controlled rather than the linear velocity and pin depth of tool. Decreasing rotational speed and increasing linear velocity and pin depth led to higher tensile strength. The profiles welded at 700 RPM, 80 mm/min and 3.7 mm had achieved the optimum case to get the value of maximum tensile strength. It is concluded that the rotational speed was the key parameter that manipulate the tensile strength in friction stir welding applied to AA6061 with AA508.