Investigation of Microstructure and Mechanical Properties of TIG and MIG Welding Using Aluminium Alloy

TIG (Tungsten Inert Gas) welding and MIG (Metal Inert Gas) welding are well known welding techniques, that are using in industries in current age. Aluminium is the most commonly used material in all industries. Aluminum is the second material in case of annual consumption after steel. Pure aluminum melts at 660 0 C, and its alloys at slightly lower temperature. The crystal structure of aluminum is FCC, and it is very ductile material. In this paper the study is done on which welding technique (TIG or MIG) is best for the aluminium alloy. The comparison is done on the basis of microstructure and mechanical properties of the welded joint of TIG and MIG welding on aluminium alloy. It was observed that TIG welding has better in Tensile strength, hardness, impact strength and microstructure compared to MIG for used aluminium alloy