A Review on Cryogenic Machining of Super Alloys Used in Aerospace Industry

Abstract The present work reviews the work done on cryogenic machining of super alloys around the four continents i.e. North America, Europe Asia and Australia. Cryogenic machining has emerged as one of the most effective procedure among the advanced machining techniques for machining super alloys. Along with that, the coating on the tool also plays a crucial role in cryogenic machining. It is found that, North American research focuses on cryogenic machining of innovative materials like shape memory alloys and ceramics. European research focuses on application of cryogenic as well as MQL techniques and studying the different types of wears and surface integrity. Several authors have also presented innovative nozzle geometries which increases cooling efficiency in cryogenic machining. Whereas Asian research focuses on tribological performance of cryogenic coolants using advanced manufacturing techniques like WEDM and using several types of coatings on tools. Australian Research focuses on tool wear and surface roughness of machined surface. More specifically, special attention is given to the main findings obtained over the last couple of years from the various authors collaborative research on cryogenic machining of super alloys, through the experimental investigations.