Study on Friction Stir Welding Of Dissimilar Aluminium 5083 And 6082 Alloys

Abstract

Aluminium and its alloys are broadly used in place of nonferrous alloys for many industrial sectors. Aluminum exhibits incredible properties in terms of strength to weight factor and thus it is far steadily changing ferrous alloys in industrial applications. In traditional welding, the joining of aluminium is mainly associated with the excessive coefficient of thermal expansion, solidification shrinkage, and dissolution of harmful gases inside the molten metal during welding. The weld joints are also associated with the segregation of secondary alloys and porosities which might be adverse to the joint qualities. Friction Stir Welding (FSW) falls in the solid-state welding method invented and proprietary by TWI in 1991. FSW overcomes the difficulties related to traditional welding. The joining method of metal/alloys takes place well below its melting point, so creating favorable among the joining method. The FSW consists of a non-consumable rotating tool made from durable material than the substrate. The tool has a shoulder and tool pin which is protruded from the shoulder. newlineThe present research attempts to connect the dissimilar alloys of aluminium (5083-H111 and 6082-T6) by FSW. Both the alloys have extensive applications in marine industries because of high resistance to corrosion and structural property. Aluminium 5083 alloy is used for the manufacture of ship hulls. Aluminium 6082 alloy finds incredible applications in the construction and transportation industry. The joining feasibility of these two dissimilar alloys is contemplated via the FSW process as it overcomes welding defects like porosity, cracks, distortion, etc arises from the fusion joining process. The current research work aspires to build a pragmatic association between the dissimilar FSW process variables and its mechanical properties. The mechanical properties sought for the joint are UTS, YS, % Elongation, and hardness. The experimentation is based on DOE and CCD practice. The RSM is adopted to develop a mathematical model among the process