Environment Friendly Machining of Ni–Cr–Co Based Super Alloy using Different Sustainable Techniques. Issue 7 (18th May 2016)

• Record Type: Journal Article
• Authors: Chetan, ; Ghosh, S.; Rao, P. V.
• Is Part Of: Materials and manufacturing processes. Volume 31:Issue 7(2016)
• Page Start: 852
• Page End: 859
• Publication Date: 2016-05-18
• Subjects: Cryogenic treatment -- MQL -- Ni based alloys -- Sustainable machining; Manufacturing processes -- Periodicals; Materials -- Periodicals; Manufactured Materials; 670.5
• DOI: 10.1080/10426914.2015.1037913
• Languages: English
• ISSNs: 1042-6914

Abstract

Abstract : In order to eradicate the use of mineral based cutting fluid, the machining of Ni–Cr–Co based Nimonic 90 alloy was conducted using environment friendly sustainable techniques. In this work, uncoated tungsten carbide inserts were employed for the machining under dry (untreated and cryogenically treated), MQL, and cryogenic cutting modes. The influence of all these techniques was examined by considering tool wear, surface finish, chip contact length, chip thickness, and chip morphology. It was found that the cryogenically treated tools outperformed the untreated tools at 40 m/min. At cutting speed of 80 m/min, MQL and direct cooling with liquid nitrogen brought down the flank wear by 50% in comparison to dry machining. Similarly at higher cutting speed, MQL and cryogenic cooling techniques provided the significant improvement in terms of nose wear, crater wear area, and chip thickness value. However, both dry and MQL modes outperformed the cryogenic cooling machining in terms of surface roughness value at all the cutting speeds. Overall cryotreated tools was able to provide satisfactory results at lower speed (40 m/min). Whereas both MQL and cryogenic cooling methods provided the significantly improved results at higher cutting speeds (60 and 80 m/min) over dry machining.