Comprehensive Review of the Machining of Incoloy 800

Heat-resistant superalloys (HRSA) offer good oxidation, corrosion, and creep resistance and exhibit better rupture strength characteristics. These HRSA are used under cyclic loads and high-temperature environments such as turbine blades, pressure vessels, turbocharger rotors, seals, boilers, and high-temperature fasteners. Inconel 718, Inconel 825, Nimonic 80A, Nimonic C263, Incoloy/Inconel 800, and Inconel 617 are some of the most used superalloys. Despite several advantages and applications, poor thermal conductivity, a tendency towards work hardening, and outstanding metallurgical consistency all adversely affect the machining of these alloys. This study reviews the various machining possibilities for Incoloy 800 superalloys to date. The present article aims to investigate multiple conventional and non-conventional machining studies on Incoloy 800 in terms of machining conditions, surface roughness (SR), Tool wear (TW), and the optimization of process parameters. Furthermore, this article summarizes the developments in machining Incoloy 800 over the past few years and identifies a prominent research gap for future studies.