Abstract
The aim of this paper is to study the feasibility of welding dissimilar aluminum alloys AA6063 and AA7075 using destructive and nondestructive testing. Dissimilar Aluminum alloys AA6063 and AA7075 plates were butt-jointed using the tungsten inert gas (TIG) welding method. The feasibility of welding of dissimilar aluminum alloy can be confirmed by both strength calculations as well as identification of welding defects. The feasibility of welding of dissimilar aluminum alloy joint was studied through visual appearance, microstructures, tensile strength, hardness, liquid penetrant test and ultrasound test. Microstructures at different zones of dissimilar TIG joints were identified. The average tensile strength and hardness values were calculated. Using the liquid penetrant test and ultrasound test, welding defects were identified. It can be concluded that TIG welding of a dissimilar aluminum alloy is feasible.
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