Micromilling of difficult-to-machine materials like Ti-6Al-4V alloy suffers from drawbacks such as tool wear and catastrophic tool breakage due to the tiny diameter of the micro tool. Hence, in this paper, an effort has been made to prolong tool life and improve surface quality via hybridization of water and CuO nanofluid-based MQL with PVD coated (AlTiN/TiAlN) and uncoated WC micro end-mill in micromilling of Ti-6Al-4V alloy. The results exhibited minimum surface roughness at lower concentration (0.25 vol%) of CuO nanofluids with AlTiN coated WC tool and diminished tool wear and built-up edge formation at higher concentration (1 vol%) water-based CuO nanofluids. Under various environmental conditions, the average size of the top burr width was determined on both the up and down milling sides. The minimum average burr width of 9.93 μm was obtained in up milling using 0.25 vol% CuO nanofluids condition with AlTiN coated tool. In the case of down milling, the minimum burr width was 10.58 μm when using 0.25 vol% CuO nanofluids with TiAlN coated tool. Furthermore, significant improvements in tool life and surface quality have been observed through the hybridized sustainable environments obtained by the combined utilization of MQL and coated tools.

由于微型刀具的直径很小，难以加工的材料（如 Ti-6Al-4V 合金）的微铣削存在刀具磨损和灾难性刀具破损等缺点。因此，在本文中，通过混合水和基于 CuO 纳米流体的 MQL 与 PVD ​​涂层 (AlTiN/TiAlN) 和未涂层 WC 微立铣刀在 Ti-6Al 微铣削中进行了努力，以延长刀具寿命并提高表面质量-4V合金。结果表明，在较低浓度 (0.25 vol%) 的 CuO 纳米流体和 AlTiN 涂层 WC 工具下，表面粗糙度最小，在较高浓度 (1 vol%) 的水基 CuO 纳米流体下，工具磨损和积屑瘤形成减少。在各种环境条件下，确定了上下铣削侧的顶部毛刺宽度的平均尺寸。最小平均毛刺宽度为 9。使用 0.25 vol% CuO 纳米流体条件和 AlTiN 涂层刀具在逆铣中获得 93 μm。在顺铣的情况下，当使用 0.25 vol% CuO 纳米流体和 TiAlN 涂层刀具时，最小毛刺宽度为 10.58 μm。此外，通过结合使用 MQL 和涂层刀具获得的混合可持续环境，已经观察到刀具寿命和表面质量的显着改善。