Enhancing Turning Processes of Inconel X750 with a Multiobjective Optimization-Driven TOPSIS Approach Using Cryotreated PVD-Coated Tools

The impact of cryogenic treatment on a PVD-coated tool, exposed to − 196 °C for 24 h, was assessed across various cutting parameters when machining INCONEL X750 material. The objective is to optimize the cutting tool parameters such as cutting speed, feed rate and depth of cut that enables better performance of the tool, wherein the performance parameters are material removal rate, tool wear and surface roughness. To realize the optimized parameters, we have used TOPSIS-Taguchi-based optimization technique. This method helps us to evaluate the optimal machining conditions and relation to their response parameters. In the current work, we have found that TOPSIS relative closeness displayed a reduced relative closeness of 19.87% at optimal machining conditions. Subsequently, ideal machining conditions reduced material removal rate (MRR) by 72.91%, tool wear (TW) by 14.38% and surface roughness (Ra) by 81.73% that are found to be satisfactory.