Optimization of Process Parameters for Friction Stir Welding on Aa6061-Coconut Ash Particulate Reinforced Metal Matrix Composite using GRA

Friction stir welding, a solid state joining technique, is a giant step in the ever constant endeavor of joining technology for materials. The superior qualities of FSW led its usage in joining Aluminum alloys for aerospace, marine, automotive and many other applications of commercial importance. The present work aims at studying the influence of various operating parameters namely speed, feed and tool diameter on the mechanical properties (Tensile strength and wear rate) of the friction stir welded joint on AA6061 alloy. The experiments are devised by deploying Design of Experiments (DOE) technique. Three factors and three levels are considered. L9 orthogonal array is deployed to conduct experiment and to evaluate factor. Multi attribute decision making technique GRA is used to optimize the process .Wear test is performed on the specimens which are filed into circular in shape and of one inch dimension as per the specifications of the wear test machine to obtain the wear rate for a specific time.