High-speed machining of Inconel 718: cutting parameters optimisation using RSM-GA approach Online publication date: Thu, 14-Sep-2023
by A.K.M. Nurul Amin; A.N.M. Amanullah Tomal; Kazi Sami Al-Jabir; Nusrat Jahan; Washima Zaman
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 25, No. 2, 2023
Abstract: This research aims at finding suitable combination of cutting parameters for high-speed machining (HSM) of Inconel 718 - a nickel-based super alloy to achieve minimum surface roughness and tool wear. Later, the findings are evaluated implying the desirability criteria of response surface methodology (RSM) and the optimisation approach of genetic algorithm (GA). It is observed that a combination of cutting speed (80-137 m/min) and feed rate (0.005-0.150 mm/tooth) yields the minimum achievable range of surface roughness and tool wear. Analysing with RSM yields average surface roughness value of 0.191 μm and tool wear 0.008 mm, whereas GA predicted these values as 0.12 μm and 0.003 mm, respectively. Later, based on the scanning electron microscope (SEM) image of the surface texture, it was concluded that high-speed produces a better surface finish and the variation in feed rate had no discernible impact on surface roughness.
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