Experimental investigation of mechanical properties on friction stir welded joints of AA 5052 H32 and AA 6061 T6 Dissimilar Alloys

Abstract

The aluminium alloys are used in applications that need a high strength-to-weight ratio, such as aerospace, naval, and automotive. These alloys can be combined with other metallic alloys for aircraft and marine applications but at the same time, joining these alloys is difficult using traditional welding techniques. Since non-heat-treatable and heat-treatable alloys have different strengths in their impurities and alloying conditions. Due to the loss of mechanical characteristics caused by excessive heat input and the imperfections created during joining, connecting these alloys using conventional welding is challenging. As an alternative to conventional welding, Friction Stir Welding (FSW) is a solid-state welding technology that produces sound, defect-free welds when joining different aluminium alloys effectively with good strength. In this investigation, the FSW process is used to join the plates from the alloys of AA5052-H32 and AA6061-T6. newlineMost of the researchers examined the influence of FSW parameters such as tool profile, welding speed and tool rotational speed on microstructural and mechanical properties of friction stir welded Al alloys and AZ31alloys, etc. To the best of our knowledge, less research work were carried out using a combination of all these FSW parameters on dissimilar welds of 5 mm thick plates AA6061-T6 and AA5052- H32 alloys. The first study of the work focuses on the importance of affect tool pin profile shapes on the microstructural and mechanical behavior of FSW of dissimilar aluminium alloys was conducted. The FSW took place between 5052-H32 and 6061-T6 of 5 mm thick plates with butt joint configuration. newline