IMPACT OF COOLING AND LUBRICATION CONDITIONS ON INCONEL 718'S CUTTING PERFORMANCE

Abstract

The superalloy Inconel 718, which is based on nickel, has superior mechanical and thermal properties. However, since it produces a lot of heat during processing, it is a difficult material to manufacture. Using the right cooling and lubrication (CL) procedures may significantly increase its cutting performance and surface integrity. This article compares four different approaches to cutting Inconel 718: cryogenic cutting (CC), dry cutting (DC), flood cutting (FC), and cryogenic minimum quantity lubrication cutting (CMQLC). Cutting forces, temperature, tool wear, chip size, roughness angle (Ra), microstructure, and residual stress (RS) are among the variables measured. The findings demonstrate that adding CL enhances processing. CMQLC produces an average temperature that is 55.47% lower than DC. CMQLC is the lowest of the four techniques, with a 25% reduction in the tool chipping area and a 32.05% reduction in
surface Ra. Regarding RS, there was an increase of 7.9% in the TRS, 3.9% in the MCRS, and 10.2% in the subsurface influence depth. In addition, machining circumstances with a high mechanical thermal ratio may lead to the achievement of a more desired RS state. The CMQLC has favourable cutting performance, good workpiece surface integrity, and mild environmental contamination.