High-speed compound sinking machining of Inconel 718 using water in oil nanoemulsion

This study proposes a novel water in oil (W/O) nanoemulsion dielectric for use in high-speed compound sinking machining. The compound machining is the combination of arc machining and electric discharge machining (EDM). The performance of the compound machining using the proposed W/O nanoemulsion is investigated systemically by comparing with that using the traditional water based dielectric. The influences of electrode polarity, peak current, and pulse duration on the material removal rate (MRR) and relative electrode wear rate (REWR) are studied. Moreover, the characteristics of machined surface are investigated using scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and micro hardness analysis. Experimental results demonstrate that compared with water based dielectric, machining with W/O nanoemulsion can obtain higher MRR, lower REWR, and better surface quality. Therefore, W/O nanoemulsion could be an alternative to water based dielectric in high-speed compound sinking machining applications.
Source: Journal of Materials Processing Technology - Category: Materials Science Source Type: research