Experimental Study on Microstructure of Friction Stir Welding of AA6061

Friction stir welding is a solid state joining method, widely used for welding the light weight alloys for air craft manufacturing, shipbuilding, automobiles and many other applications of commercial importance. Friction stir welding (FSW) can produce better mechanical properties in the weld zone compared to the old conventional welding methods. Later, the best composition of the material will be selected from test results, and this will be used as the main tool in friction stir welding. The material, which is to be welded, is also made up of same composition used in the tool. Friction stir welding (FSW) can produce sound mechanical properties in the weld zone. The tool gives the functions of heating of work piece, deform the material and movement of deform material to produce the joint. Scanning Electron Microscopy test has been performed to study the microstructure of the FSW produced by our tool. Friction stir welding can be widely applicable in Aircrafts, rockets, automobiles, robotics etc.