Abstract

Metalworking fluids (MWFs) lubricate, reduce forces and surface finish, and remove heat and swarf from the cutting zone. Lubricity additives influence wear and forces by reducing friction and preventing seizure. Additives(mineral oil, phosphate ester (P-ester), and dialkyl pentasulphide) were assessed for their machinability performance during Ti 6-4 milling with tungsten carbide(WC) endmills to establish life and cutting force coefficients (CFCs).P-ester additive provided the best performance;dialkyl pentasulphide(DPS) the lowest;CFCs varied with each additive; and a strong correlation was observed between Kte and life. The potential for accelerated MWF testing was outlined.

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