Investigation of the microstructure and mechanical properties of AA6063 and AA7075 dissimilar aluminium alloys by friction stir welding process

riction stir welding (FSW) is one of the advanced welding processes to join both similar and dissimilar alloys and materials. The FSW process is most widely used in automotive, aerospace, and nautical industries to join similar and dissimilar aluminum alloys. In this research work, two dissimilar aluminum alloys of AA6063 and AA7075 were joined using the friction stir welding process and characteristics of the welded joint were studied. Friction stir welded joints of dissimilar alloys were studied by varying the input process parameters of tool rotating speed of 800, 1000 to 1200 rpm with varied the welding speed of 30 to 60 mm/min. The influence of varying the input parameters was studied by the mechanical properties of the friction stir welded (FSW) specimen and the microstructure were analyzed using SEM images.