Investigation of Friction Stir Welding Parameters of 6063-7075 Aluminum Alloys by Taguchi Method

In this work, effect of some welding parameters such as rotational speed, travel speed and plates’ position on microstructure and mechanical properties of Friction Stir Welded joint of 6063 and 7075 alloys was predicted via Taguchi method. Signal to Noise ratio (S/N) analysis indicated that maximum tensile strength achieved when rotational and travel speeds, and plates’ position were chosen as 1600 rpm, 120 mm/min and Al7075 in advancing side (AS-7075), respectively. According to ANOVA analysis, it was observed that rotational, travel speed and plates’ position have 59, 30 and 7 percent influence on tensile strength of joint respectively. Finally a model for tensile strength values based on FSW parameters was calculated which was also confirmed by experimental results.