Investigation on the Weldability, Mechanical and Metallurgical Properties of Activated Tig Weldments of Aluminium Alloy 7075

Tungsten Inert Gas Welding (TIG) is a welding process that has low weld penetration and low heat intensity of the electric arc. This affects the low productivity of processes. To overcome this drawback, Activated Tungsten Inert Gas Welding has been developed. This study investigates Al-7 series plates using the A-TIG welding process. Different kinds of fluxes, TiO2 and Al2O3 are used with a ratio of 1:1 mixture of both these powders. This mixture was applied on Al-7075 plates to enhance weld characteristics. Activated flux has been used to improve the weld depth. The effects of various process parameters (welding current (I), welding speed(V), and gas flow rate were analysed and compared with the TIG welding method. Activated Tungsten Inert Gas (A-TIG) welding canincrease the joint penetration and weld depth width ratio compared to conventional TIG welding. The main objective of this work is to enhance weld penetration, improve mechanical properties (tensile strength and elongation), and assess metallurgical changes in Al-7075 joints using A-TIG welding with TiO₂ and Al₂O₃ mixed fluxes.