Experimental Investigation on Dissimilar Metals Welding of Aluminium 6063 & Aluminium 5754

Abstract

In all industries, including the manufacturing of automobiles, nuclear power plants, boilers, petrochemicals, and chemicals, different metals have been bonded or welded together are frequently used. Due to their less weight and improved mechanical and chemical properties when combined, two dissimilar metals are now used far more frequently than when they were used alone. This work focuses on investigating the microstructural-mechanical characteristics of dissimilar welding of Aluminium-6063 and Aluminium-5754 by using Gas-Tungsten Arc Welding (GTAW). The mechanical behavior has been assessed using microhardness profiles, tensile and bend tests, and the microstructure was assessed using optical microscopy. Finally, dissimilar welding Subjected to tensile test failed in the HAZ (59.46MPa), In the bend test, no cracks or openings were observed in the dissimilar metal welding, while cracks were observed in the similar metal welding, during hardness test it is observed that weld area is stronger than base metal and parent metal in dissimilar metal welding when compared to similar metal welding.