Thermophysical Investigations of Mango Seed Oil as a Novel Cutting Fluid: A Sustainable Approach Toward Waste to Value Addition

Abstract

In the present work, a novel cutting fluid has been extracted from mango (Mangifera indica L.) seeds using the soxhlet technique. Cutting fluid from agricultural waste can reduce the shortage of edible oils and eliminate the need to dispose them. Therefore, nonedible oils are economically comparable with edible oils. In order to validate the effectiveness of extracted cutting fluid, thermophysical characterization and tribology tests were performed. The obtained results were compared with edible and nonedible oils, such as sunflower oil (SFO) and mahua seed oil (MaSO), respectively. Friction tests were conducted using a tribometer with pin-on-disk (WC-Co/Ti-3Al-2.5V) at different tribological conditions. The worn surface and wear mechanism of disks were examined using a scanning electron microscope (SEM) associated with energy-dispersive spectroscopy (EDS) for comparing the elemental composition quantitatively. These findings showed that mango seed oil (MSO) exhibited the lowest coefficient of friction (COF) and wear volume followed by MaSO, SFO, and dry, respectively. SEM analysis showed that no plowing was observed

however, small pits and cracks were found on wear track under MSO. Further, the abovementioned oils were used as a cutting fluid in the machining of Ti-3Al-2.5V (grade 9 alloy). In this regard, MSO has shown a similar effect in turning operation with minimum quantity lubrication (MQL) system.