Machining behavior of Inconel 718 superalloy: Effects of cutting speed and depth of cut

• Published in: Materials today : proceedings Vol. 26; pp. 200 - 208
• Main Authors: Thrinadh, Jadam, Mohapatra, Ansumita, Datta, Saurav, Masanta, Manoj
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2020
• Subjects: Abrasion; Adhesion; Flank wear; Inconel 718; Superalloy; Sustainable manufacturing; Sustainable manufacturing; Superalloy; Abrasion; Flank wear; Inconel 718; Adhesion
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2019.10.128

Usage of cutting fluids during machining makes machining process efficient for ‘difficult-to-cut’ materials (like nickel based Inconel 718 superalloys). However, cost associated with cutting fluid acquisition, usage, dumping of utilized oil, and cleaning of the end product appears nearly four times more than the cost of machining under dry condition. In addition, increased attention towards sustainable manufacturing by imposition of stringent government regulations nowadays enforce industries to restrict environmental degradation as well as to reduce/minimize occupational health hazards; hence, utilization of cutting fluids in manufacturing industries is being restricted, and, therefore, industries are being encouraged towards dry machining. In the context, present work experimentally investigates different tool wear modes for machining of Inconel 718 under dry condition using uncoated tungsten carbide insert. Effects of cutting speed and depth of cut on cutting force, and flank wear progression depth are investigated. It is observed that cutting force and flank wear progression depth increase with increasing cutting speed as well as depth of cut. In all worn out tool inserts, dominant wear mechanism observed is combined adhesion and abrasion. Chip’s macro/micro morphology is studied; effects of input variables on chip morphology are discussed as well.