Investigation of The Properties of Tig Welded Dissimilar Alloys of Inconel X750 and Inconel 718 Utilizing MOORA Techniques

Tungsten Inert Gas (TIG) welding is capable of producing high-quality welds with a remarkable level of precision, making it a widely utilized technique in the modern automotive and aerospace sectors. Within the scope of this study, the current research implements the Taguchi single objective function and multi-objective optimization method based on ratio analysis (MOORA) to identify the most effective combination of yield strength, tensile
strength, and elongation in the TIG welding process of dissimilar metals such as INCONEL 718 and INCONEL X750. The key input parameters considered include welding speed,
current, and gas flow rate. The findings indicate that the optimal combination of input parameters, leading to a maximum tensile strength of 623.62 MPa, yield strength of 571.85 MPa, and 12.2 mm elongation, is achieved at a welding current of 60 Amps, welding speed of 125 mm/min, and gas flow rate of 12 l/min. Keywords: TIG welding, Dissimilar alloys, Inconel X750, Inconel 718, Moora Technique