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Mia, Mozammel; Dhar, Nikhil Ranjan
Journal of materials processing technology, February 2018, 2018-02-00, 20180201, Volume: 252Journal Article
Display omitted Effective heat removal from cutting zone is expected to ensure favorable machinability. In this context, turning of Ti-6Al-4V (grade 5) has been conducted under the implementation of two thin jets of pressurized coolant; one jet was aimed at the chip-tool interface whereas another jet was directed towards the tool-work interface. Afterward, the effects of duplex coolant jets on chip-tool interface temperature were studied. Furthermore, as part of machinability investigation the mean surface roughness, cutting force, tool wear and chip formation have been analyzed at varying cutting speed and feed rate combinations. The most dominant wear mechanisms, revealed by scanning electron microscopic images were, in dry cutting the adhesion and rubbing, and in HPC-assisted turning the crater wear and flank wear. The enhanced heat dissipation by double jets is accredited as the primary reason for the reduction of cutting forces, surface roughness and tool wear.
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