Regular Article

Performance comparison of vegetable oil based nanofluids towards machinability improvement in hard turning of HSLA steel using minimum quantity lubrication

¹ Department of Industrial Design, National Institute of Technology, Rourkela 769008, Odisha, India
² Department of Mechanical Engineering, National Institute of Technology, Rourkela 769008, Odisha, India
³ Department of Production Engineering, Veer Surendra Sai University of Technology, Burla 768018, Odisha, India

^* e-mail: das.sudhansu83@gmail.com

Received: 15 February 2019
Accepted: 20 May 2019

Abstract

The search of finding best vegetable oil based nanofluid from a set of three nanoparticle enriched cutting fluids for machining is core objective of the work. Extensive research has been done to replace conventional cutting fluids by nanofluids, but abundant analysis for vegetable oil based nanofluids is accomplished in this work which was not seen earlier. Also, the study investigated the cutting performance and comparative assessment towards machinability improvement during hard turning of high-strength-low-alloy (HSLA) AISI 4340 steel using four different compositions of nanofluids by minimum quantity lubrication (MQL) technique. Cutting are investigated and analyzed through this article during hard turning using minimum quantity lubrication (MQL). Cutting force, tool wear (flank and crater), surface integrity (surface roughness, residual stress, microhardness, and surface morphology), and chip morphology are considered as technological performance characteristics to evaluate the machinability of hardened AISI 4340 steel. Additionally, the effect of various fluid properties like thermal conductivity, viscosity, surface tension and contact angle were examined for all nanofluids. Three set of nanofluid samples were prepared using Al₂O₃, CuO and Fe₂O₃ with rice bran oil and their various properties are analysed at 0.1% concentration. On comparison among these three nanofluids used, CuO nanofluid exhibited superior behavior followed by Fe₂O₃ nanofluids while Al₂O₃ nanofluid was last in the row.