On the Role of Amylum Additive-Based Cutting Fluids in Machining—An Experimental Investigation

This work deals with the application of amylum additive-based cutting fluids while turning AISI 304 steel using carbide inserts. Amylum additive is dispersed in vegetable oil at varying percentages. Absorbance of the additive in pure bio-oil is examined using spectrophotometer, and thermal conductivity of these formulations is also obtained. Machining performance is assessed by comparing dry, synthetic cutting fluid, and pure oil for fixed cutting conditions. After basic machining, percentage of amylum additive is changed, and machining is done to examine the best concentration (0.3–0.9%) of additive in pure oil through minimal quantity lubrication technique. Machining performance is obtained by measuring cutting tool temperatures, surface roughness, and tool flank wear. It is inferred that, when compared to dry machining, synthetic fluid, and pure oil-assisted machining, amylum-assisted cutting fluids have resulted in improved machining performance owing to the reduction in cutting temperatures and better lubricity. Hence, it can be comprehended that amylum additive has the potential to be used as an additive in biodegradable oils in view of eco-friendly and user compatible machining operations.