This novel work focuses on turning Inconel 718 alloy using different sustainable lubricating-cooling techniques. Cryogenic machining (Cryo), minimum quantity lubrication (MQL) and nanofluid MQL (NFMQL) were applied and their performances in terms of obtainable surface integrity evaluated in comparison with dry cutting (dry) and wet machining (wet). The surface integrity was analyzed from the aspect of surface roughness, surface morphology and defects, microhardness, microstructure, and chip morphology. The experimental results revealed that Cryo offered overall better performances when compared to dry, wet, MQL and NFMQL strategies: lower surface roughness, fewer surface defects and lower chip compression ratio were observed. Furthermore, increasing the cutting speed led to higher surface roughness and incidence of surface defects for all the applied strategies, except for Cryo.

这项新颖的工作着眼于使用不同的可持续润滑冷却技术来车削Inconel 718合金。进行了低温加工（Cryo），最小量润滑（MQL）和纳米流体MQL（NFMQL），并与干切削（干）和湿加工（湿）相比，评估了它们在可获得的表面完整性方面的性能。从表面粗糙度，表面形态和缺陷，显微硬度，显微组织和切屑形态等方面分析了表面完整性。实验结果表明，与干，湿，MQL和NFMQL策略相比，Cryo具有更好的整体性能：观察到更低的表面粗糙度，更少的表面缺陷和更低的切屑压缩比。此外，