Optimization of process parameters for welding cupronickel alloys using CO2 laser welding process was investigated in this study. Laser Beam Welding (LBW) process, is one of the beneficial techniques for airplane fastening. Turbine motor components were made up of superalloy because of its high specific, low heat input, high heat focus, high-power density, and low contortion. Using CO2 LBW process, welding can be done on a wide range of materials, especially alloys which are difficult to weld by conventional welding process. This investigation focuses on optimizing the LBW process parameters of cupronickel alloys utilizing multi criteria decision making (MCDM) methodology and TOPSIS analysis. The input parameters like laser power, welding speed, welding angle and welding current are preferred as the fundamental part to enhance the welding. Welding process is carried out on 16 specimens in order to improve and support mechanical and metallurgical qualities of the welded parts. Welding is made with four input variables in two levels of values. TOPSIS has been employed as a statistical design tool to identify the most significant parameters on the overall Multiobjective function. Among the experiments, the best mechanical properties were observed in welding made with the parameters like Welding current (900 W), Welding angle (90°), Welding speed (1.4mm/min) and Laser power (30 W). This investigation strives to reveal the better process parameters, mechanical properties and energy consumption of CO₂ LBW welded elements of cupronickel alloy

Keywords: Energy consumption, Laser beam welding, CO₂ laser, TOPSIS, Mechanical properties