Experimental investigation and optimization of Oxy-Acetylene assisted machining parameters for Nickel based alloy Inconel — 718

This paper presents an experimental investigation of Inconel-718 nickel based alloy using Oxy-Acetylene Assisted Machining (OAAM) process, which is difficult-to-cut at room temperature and then results in disproportionate tool wear and poor surface finish. The workpiece surface is heated just before machining operation starts. This is done using external heat source till the set value of temperature is attained, due to heating the material surface is soften which enhances the material removal rate. The set value of temperature is constant while turning the workpiece surface using temperature control system on conventional lathe machine with the help of tungsten carbide cutting tool. This paper presents the design of experiment based on Taguchi method which is used to find the optimal cutting parameters for surface roughness. In this study, the methodology of L9 orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) is applied to synthesize the effect of these parameters on Nickel based alloy Inconel-718.