Enhancing grindability of Ti–6Al–4V applying ecological fluids under SQL using SiC wheel

Abstract

Improving grindability of a given material with the application of cutting fluid is a well-established strategy. However, demands from sustainable manufacturing strive for reduction in cutting fluid consumption as well as introduction of unconventional coolants of non-toxic origin to be employed during the operation without sacrificing its performance. Present experimental investigation deals with the analyses of the performances of some unconventional cutting fluids viz. soap water, sodium nitrite and propylene glycol under small quantity lubrication while grinding Ti–6Al–4V using silicon carbide wheel. Relevant parameters to estimate grindability, like grinding force and specific energy requirements, surface roughness, grinding ratio (G ratio), SEM micrographs of ground surface and images of grinding chips are critically analysed and compared with the results obtained using conventional synthetic fluid and dry grinding. Results have revealed that the unconventional grinding fluids perform more satisfactorily. Among all the fluids applied, propylene glycol has provided with much superior grinding results. It has significantly reduced grinding forces, specific energy, surface roughness and improved G ratio while providing superior surface quality.