Investigation on Machinability Characteristics of Inconel 718 Alloy in Cryogenic Machining Processes

Abstract

In this innovative work, Inconel 718 alloy turning simulation models under dry and cryogenic machining (Cryo) conditions are developed. The machinability characteristics of the aforementioned alloy were assessed with relation to cutting temperature ((Formula presented.)) and cutting force ((Formula presented.)). The comparison of the (Formula presented.) and (Formula presented.) results from simulation with those obtained under the identical experimental conditions served as additional evidence of the effectiveness of the suggested simulation model. By varying the cutting speed, the reduction in (Formula presented.) under Cryo conditions was 9.36% to 11.98% compared to dry cutting. Regarding the force comparison under experiment and simulation, the average difference between the simulation and experimental values for the main cutting force ((Formula presented.)) was 13.73%, whereas the average deviation for the feed force ((Formula presented.)) was 14.63%. Response surface methodology (RSM) was employed to build the forecasting models for (Formula presented.) and (Formula presented.) in cryogenic settings. These mathematical models showed excellent predictive performance and were able to estimate the (Formula presented.) and (Formula presented.) under machining operations settings, according to the present research. When compared to dry cutting, Cryo reduced the cutting temperature, which had a positive impact on the alloy’s machinability.