Effect of process parameters on AA 7108 T79 using friction stir welding on single side and double side welded joint

Abstract

AA 7108 T79 is a recently developed grade of Aluminum alloy which use in production of auto parts such as bumpers, and more recently in load bearing structures such as ship deckings and stiffeners. Friction stir welding is used to weld AA 7108 T79 plates as of it is difficult to make joint using fusion welding processes. In this research work we have investigate the effect of welding input parameters tool rotational speed and welding speed on Tensile strength and Hardness. We performed experiments on single side and double side FSW to find out which parameters have significant effect on weld joint for best weld strength using ANOVA. Also, a comparison study carried out for Double side joint and single side joint for tensile strength and Hardness. We found that 800 RPM tool rotation speed and 80 mm/min welding speed gives better tensile strength. Double side weld joints have superior weld strength than
single side weld joint in terms of tensile strength.