Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Abstract

Minimizing the negative effects of the manufacturing process on the environment, employees, and costs while maintaining machining accuracy has long been a pursuit of the manufacturing industry. Currently, the nanofluid minimum quantity lubrication (NMQL) used in cutting and grinding has been studied as a useful technique for enhancing machinability and empowering sustainability. Previous reviews have concluded the beneficial effects of NMQL on the machining process and the factors affecting them, including nanofluid volume fraction and nanoparticle species. Nevertheless, the summary of the machining mechanism and performance evaluation of NMQL in processing different materials is deficient, which limits preparation of process specifications and popularity in factories. To fill this gap, this paper concentrates on the comprehensive assessment of processability based on tribological, thermal, and machined surface quality aspects for nanofluids. The present work attempts to reveal the mechanism of nanofluids in processing different materials from the viewpoint of nanofluids’ physicochemical properties and atomization performance. Firstly, the present study contrasts the distinctions in structure and functional mechanisms between different types of base fluids and nanoparticle molecules, providing a comprehensive and quantitative comparative assessment for the preparation of nanofluids. Secondly, this paper reviews the factors and theoretical models that affect the stability and various thermophysical properties of nanofluids, revealing that nanoparticles endow nanofluids with unique lubrication and heat transfer mechanisms. Finally, the mapping relationship between the parameters of nanofluids and material cutting performance has been analyzed, providing theoretical guidance and technical support for the industrial application and scientific research of nanofluids.

Optimization of surface roughness in milling of EN 24 steel with WC-Coated inserts using response surface methodology: analysis using surface integrity microstructural characterizations

“…The optimal zone may be observed in a comparable way as depicted in Figure 6A, where an array of blue contours can be discerned, indicating lower values of surface roughness. The figure provided in this study illustrates that certain combinations of depth of cut and cutting speed yield more favourable outcomes in terms of generating smoother surfaces (Chu et al, 2023;Sun et al, 2023).…”

Experimental investigation of nanofluid lubrication on surface roughness under MQL aluminum alloy 6061-T6 series in drilling

“…The addition of nanoparticles to the base fluid of the MQL system greatly enhances its lubricating properties (Pal et al , 2020). Researchers have proposed that incorporating metallic or non-metallic particles or nano-sized fibers (smaller than 100 nm) into MQL base oil can enhance its thermal conductivity and reduce the cutting temperature (Chu et al , 2023; Gugulothu and Pasam, 2022; Pal et al , 2022a; Ross et al , 2023). Nanofluids can improve tool life and enhance the quality of workpiece surfaces by better penetrating the cutting tool-chip interface and reducing tool wear (Özbek, 2023).…”