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Experimental Investigation of Combine Effect of Welding Speed, Tool Pin Profiles and Preheat Temperature on Mechanical Properties of Friction Stir Welded AA6061-T6 Joint based on Response Surface Methodology

Satyam Patel, H. N. Shah

Abstract


Two similar of dissimilar material can be joined by Friction stir welding (FSW) in solid state. Friction stir welded joint can be made by using non-consumable tool with rotary and transverse motion with intimate contact to material to be welded. These experimental investigations was carried out by taking different FSW parameters tool rotation speed, tool travel speed, tool pin profile and preheat temperature to find out its effect on mechanical properties of AA6061-T6. Response surface methodology is used to generate design of experiment. The range of variation of tool rotation speed is from 1000, 1200 and 1400 rpm, tool travel speed of 45 mm/min, preheat temperature 175°C, 200°C, 225°C along with straight cylindrical, triangular and taper straight flute tool pin profile. Highest tensile strength of 131MPa obtained by taper straight flute pin profile tool at tool rotation speed of 1000 rpm and 175°C preheating temperature as compared to base material tensile strength 276MPa which is 47% of base material value among all other welded coupons. No cracks obtained in the bending test for the joints welded by triangular and taper straight flute pin profile tools. Highest hardness of 68(HRB) obtained by taper straight flute pin profile tool at 1000 rpm tool rotation speed and 175°C preheating temperature as compared to base material hardness of 60(HRB) which is 13% higher of base material value among all other welded coupons. Highest ductility (% elongation) of 18.75% obtained by triangle pin profile tool at 1200 rpm tool rotation speed and 200°C preheat temperature as compared to ductility of 29.8% of base material among all welded coupons.

Cite this Article. Satyam Patel, Shah HN. Experimental Investigation of Combine Effect of Welding Speed, Tool Pin Profiles and Preheat Temperature on Mechanical Properties of Friction Stir Welded AA6061-T6 Joint based on Response Surface Methodology. Trends in Machine Design. 2017; 4(2): 15–24p


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