This study focused on the effects of pulse current factors, such as peak current, base current, pulse frequency, and pulse length, on the mechanical and metallurgical characteristics of AA5754-H111 steel during gas tungsten arc welding. A total of eighteen connections were created by correcting the above changes. The purpose of the current research is to examine the mechanical and microstructural characteristics of welded joints. The optical microscope and SEM analysis were used to carry out the metallurgical characterization. The different types of welding parameter used and evaluated all the welded samples. The combination of 160A peak current, 75 Hz pulse frequency, and a 42% duration pulse results in the welded samples' superior mechanical properties as compared to other input welding conditions. These joints have advantages such as consistently distributed deposits, better fusion zone hardness, and increased grain quality in the weld zone. These characteristics assist to enhance the tensile characteristics present in joints

Keywords: Aluminium alloy, TIG welding, Mechanical properties, Microstructural properties