An Optimization of Process Parameters of Friction Stir Welded Joints AA 6063 Aluminium Alloys by Taguchi OA L9 Method

Friction stir welding is widely used in joining aluminum alloys in industries, especially, the shipbuilding, aerospace, mass transportation and automotive and other commercial importance. This process is considered as its energy efficiency, environmental friendly and versatility. Friction stir welding was carried out using a vertical milling machine on aluminum 6063 alloy. The tool material and geometry were carefully chosen and prepared using lathe machine. important process parameters that control the quality of the weld and rotation speed (rpm), transverse speed (mm/min), tool depth (mm) and tool tilt angle and these process parameters were optimized to obtain defect free welding joints.it is observed that, during the friction stir welding, extensive deformation takes place at the nugget zone and the evolved microstructure properties of the joint. The aim of present study is to understand the strength, quality of fsw and mechanical properties and micro structural changes of the friction stir welded joint. In this research L9 orthogonal method is used to find out the optimum values of tensile test, Micro Vickers hardness Test and microstructure test.