Surface roughness and topography of EDM machining of Inconel 718

Abstract

An alloy with a nickel–chromium basis known as Inconel 718 is utilised in gas turbine and jet engine applications. The machining of the Inconel 718 is challenging because of its higher strength and hardness. Electrical Discharge machining is the most common operation used for machining Inconel alloys because of its higher accuracy in machining the alloy. The machining accuracy is evaluated by the surface roughness of the material. In this research, the machining of Inconel 718 alloy using the electric discharge machining is done by varying the input parameters. Taguchi design is used for varying the input parameters of Electrical discharge machining. The efficiency in machining is evaluated by measuring the surface roughness of the Inconel alloy. The signal-to-noise ratio analysis optimises process parameters for excellent surface roughness. The analysis of variance is used to determine the impact of each input variable on the surface roughness. The result of this research is helpful for researchers and industries to select the accurate process parameter for machining Inconel 718 alloy.