Effect of Process Parameters on Mechanical and Metalurgicul Properties of Aluminium Weld Joint using Gas Metal Arc Welding Process

This Paper Presents an Effect of Process Parameters On mechanical and metallurgical properties of aluminium weld joints using Gas Metal Arc Welding (GMAW). We considered aluminium alloys which widely used in marine, aerospace, pipe industries etc. Aluminium alloys are light in weight comparably less density with better mechanical properties with mild steel. So we considered Aluminium alloys for study. Due to the affinity of aluminium for oxygen, it cannot successfully be arc welded in an air environment. If fusion welded in a normal atmosphere oxidisation readily occurs and this results in both slag inclusion and porosity in the weld, greatly reducing its strength. To overcome these problems one of the most common ways of welding aluminium has been to use the electric arc process whilst shielding the weld pool with an inert gas in Gas Metal Arc Welding process. we select AA-6063 Aluminium alloy for investigation. The variables that choose in this study are welding current and welding feed and Gas flow rate. The Ultimate Tensile strength, microstructure and hardness were measured for each specimen after the welding process and the effect of it was studied.