Abstract
In this work, a novel hybrid lubri-cooling (ethanol, ester oil, dry ice) is proposed as metal cutting fluid. To validate the effectiveness of the proposed hybrid lubri-cooling, thermo-physical, and tribological performance is tested initially with pin-on-disc (WC–6Co, Ti–6Al–4V) tribology. The effectiveness of ethanol-ester oil with/without mixing of dry ice is compared to air/dry cutting. The surface tribology and wear mechanism of pin-on-disc are investigated under this novel hybrid lubri-cooling system regarding three-dimensional surface topography and Scanning Electron Microscope (SEM). The findings indicated the lowest friction coefficient, friction force, wear rate under ethanol-ester oil dry ice followed by ethanol-dry ice, ethanol, and dry cutting, respectively. The microscopic analysis showed minor feed-marks/microcracks on disc traces under ethanol-ester oil dry ice (−78 °C).
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