OBRABOTKAMETALLOV Vol. 26 No. 4 2024 TECHNOLOGY Investigation of vegetable-based hybrid nanofl uids on machining performance in MQL turning Javvadi Eswara Manikanta 1, a, Nitin Ambhore 2, b, *, Sonal Shamkuwar 3, c, Naveen Kumar Gurajala 4, d, Santha Rao Dakarapu 5, e 1 Department of Mechanical Engineering, Shri Vishnu Engineering College for Women (A), Bhimavaram, Andhra Pradesh, 534202, India 2 Department of Mechanical Engineering, Vishwakarma Institute of Technology, SPPU, Maharashtra, Pune 411037, India 3 Department of Mechanical Engineering, Vishwakarma Institute of Information Technology, SPPU, Maharashtra, Pune 411048, India 4 Department of Mechanical Engineering, CMR College of Engineering and Technology, Hyderabad, Telangana, 501401, India 5 Department of Mechanical Engineering, Visakha Institute of Engineering and Technology, Narava, Visakhapatnam, 530027, India a https://orcid.org/0000-0002-0881-4899, manijem66@gmail.com; b https://orcid.org/0000-0001-8468-8057, nitin.ambhore@viit.ac.in; c https://orcid.org/0000-0001-7633-0813, sonal.shamkuwar@viit.ac.in; d https://orcid.org/0000-0003-0829-7622, naveenkumargurrijala84@gmail.com; e https://orcid.org/0000-0001-7679-7448, dsantharao@gmail.com Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2024 vol. 26 no. 4 pp. 6–18 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2024-26.4-6-18 ART I CLE I NFO Article history: Received: 07 August 2024 Revised: 21 August 2024 Accepted: 17 September 2024 Available online: 15 December 2024 Keywords: Nanofl uid Lubrication Machining Performance Turning ABSTRACT Introduction. Vegetable-based hybrid nanofl uids are increasingly important in the context of Minimum Quantity Lubrication (MQL) turning due to its enhanced lubrication properties and environmental benefi ts. These nanofl uids, which typically combine vegetable oils with nanoparticles like graphite or titanium dioxide, improve machining performance by reducing friction and cutting forces, leading to better surface fi nish and tool life. The purpose of the work. Coated carbide tools are widely used for machining SS 304 stainless steel due to its wear resistance and high temperature resistance. The purpose of the current work is to evaluate the machining performance of SS 304 steel under diff erent concentrations of hybrid nanofl uids. The methods of investigation. In this study, an attempt was made to use copper oxide/aluminum oxide (CuO/Al2O3) hybrid nanoparticles mixed with corn oil. A total of six hybrid cutting fl uids with 100 ml volume and diff erent mass concentration (0.4 %, 0.8 %, 1.2 %, 1.6 %, 2 %, and 2.4 %) were developed and its performance on SS 304 steel was investigated. Results and discussion. The fi nding revealed that with an increase in the mass concentration, the thermophysical properties improve. In addition, it is shown that friction decreases with an increase in the particle concentration to 1.6 wt. %. At a concentration of 1.6 wt. % of CuO/Al2O3 hybrid cutting nanofl uid showed the best performance characteristics. This study also provides a comparison with dry turning. The highest tool wear was observed in dry turning, followed by turning using corn oil. A 32 % reduction in cutting force is observed. The surface roughness when using CuO/Al2O3 hybrid cutting nanofl uid is reduced by 27.7 %. However, when using a hybrid nanofl uid (2.4 % of CuO/Al2O3), low tool wear is observed. In this study, the possibility of using vegetable-based hybrid nanofl uids for metal turning with a minimum amount of lubricant is considered. For citation: Manikanta J.E., Ambhore N., Shamkuwar S., Gurajala N.K., Dakarapu S.R. Investigation of vegetable-based hybrid nanofl uids on machining performance in MQL turning. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2024, vol. 26, no. 4, pp. 6–18. DOI: 10.17212/1994-6309-2024-26.4-6-18. (In Russian). ______ * Corresponding author Ambhore Nitin, Ph.D. (Engineering), Assistant Professor Vishwakarma Institute of Technology, Pune - 411037, Maharashtra, India Tel.: +91-2026950441, e-mail: nitin.ambhore@viit.ac.in Introduction During machining, a large amount of heat is generated in the cutting zone and friction occurs, which reduces performance [1]. Therefore, eff ective cutting fl uids and methods of introducing lubricant between the rubbing surfaces are required. Cutting fl uids help to maintain a low temperature in the contact zone of the tool and the workpiece [2, 3]. To some extent, traditional cooling methods and cutting fl uids serve this objective, but intensive use of conventional cutting fl uids leads to environmental pollution and is also toxic
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