ABSTRACT This article discussed the impact of various nanofluids on the machinability aspects during hard turning of AISI 4340 alloy steel. The experiment was performed using minimum quantity lubrication (MQL) technique. The effect of various fluid properties like thermal conductivity, viscosity, surface tension and contact angle were analyzed for all nanofluids. Various samples of nanofluids were prepared by dispersing nanoparticles of ZnO, CuO, Fe2O3, and Al2O3 in deionized water. The impacts of nanofluids on various machinability responses were measured and analyzed. Out of the four nanofluids used, CuO nanofluid exhibited superior behaviors followed by ZnO nanofluids while the influence of Al2O3 has insignificant.

中文翻译：

---

使用纳米切削液通过 MQL 技术加工硬化钢

摘要 本文讨论了各种纳米流体对 AISI 4340 合金钢硬车削过程中可加工性方面的影响。该实验是使用最小量润滑 (MQL) 技术进行的。分析了所有纳米流体的各种流体特性的影响，如热导率、粘度、表面张力和接触角。通过将 ZnO、CuO、Fe2O3 和 Al2O3 纳米粒子分散在去离子水中，制备了各种纳米流体样品。测量和分析了纳米流体对各种可加工性响应的影响。在使用的四种纳米流体中，CuO 纳米流体表现出优异的行为，其次是 ZnO 纳米流体，而 Al2O3 的影响不显着。