Friction and wear characteristics of water-based nanofluids were studied. Deionized water-based nanofluids were prepared with alumina (Al₂O₃), hBN, MoS₂, and WS₂ nanoparticles. Tribological study of the prepared nanofluids was undertaken on a ball-on-disk tribometer in minimum quantity lubrication (MQL) mode on Ti-6Al-4 V workpiece. The effect of flow rate on the coefficient of friction (μ) and wear of the workpiece was reported for different nanofluids. 3D profiles of the wear tracks were obtained to study the wear depth and wear profile. Alumina-based nanofluids have shown excellent performance in terms of friction and wear as compared to the other nanofluids. The coefficient of friction, wear track depth and specific wear were reduced by 53.89 %, 23.4 %, and 37.03 % respectively for alumina nanofluid in MQL mode as compared to the dry environment. A commercial cutting fluid (UNILUB 2032) was used for comparative studies. The commercial cutting fluid performed slightly better than the alumina nanofluid, both used in MQL mode. Even though hBN, MoS₂, and WS₂ are solid lubricants, their performance as nanofluids in MQL mode was not better than alumina nanofluids. Alumina particles, being spherical shaped, were able to provide better lubrication owing to the ball-bearing effect. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) of the wear tracks were conducted to understand the mechanism of friction and wear reduction. Micromilling experiments were done on Ti-6Al-4 V using the prepared cutting fluids in MQL mode to evaluate their effect on machining forces and burr formation. Alumina nanofluids and the commercial lubricant have shown significant reduction in machining forces and burr formation as compared to the other nanofluids. This is in correlation to the tribological performance of these cutting fluids.

研究了水基纳米流体的摩擦磨损特性。用氧化铝（Al ₂ O ₃），hBN，MoS ₂和WS ₂制备去离子水基纳米流体纳米粒子。在Ti-6Al-4 V工件上，以最小润滑（MQL）模式在圆盘球式摩擦计上对制备的纳米流体进行了摩擦学研究。对于不同的纳米流体，报告了流速对摩擦系数（μ）和工件磨损的影响。获得磨损轨迹的3D轮廓以研究磨损深度和磨损轮廓。与其他纳米流体相比，氧化铝基纳米流体在摩擦和磨损方面表现出出色的性能。与干燥环境相比，MQL模式的氧化铝纳米流体的摩擦系数，磨损轨迹深度和比磨损分别降低了53.89％，23.4％和37.03％。使用商业切削液（UNILUB 2032）进行比较研究。商业切削液的性能略优于氧化铝纳米流体，两者都在MQL模式下使用。即使hBN，MoS₂和WS ₂是固体润滑剂，它们在MQL模式下作为纳米流体的性能并不比氧化铝纳米流体好。球形的氧化铝颗粒由于具有滚珠的作用而能够提供更好的润滑。进行了磨损轨迹的扫描电子显微镜（SEM）和能量色散X射线光谱（EDS），以了解摩擦和减少磨损的机理。使用制备的切削液以MQL模式在Ti-6Al-4 V上进行了微铣削实验，以评估其对加工力和毛刺形成的影响。与其他纳米流体相比，氧化铝纳米流体和市售润滑剂已显示出加工力和毛刺形成的显着降低。这与这些切削液的摩擦学性能有关。