The need for developing sustainable manufacturing processes which should have a good balance between economic viability and environmental protection is one of the key challenges against manufacturers. The conventional carbon-based cutting fluids used in machining processes are found to be unsustainable in terms of a higher impact on ecology and hence it is required to develop alternative sustainable cutting fluid strategies. However, the research that compares conventional, cryogenic and Minimum Quantity Lubrication (MQL) machining based on all pillars of sustainability i.e., machining performance, environmental impact and human health is still lacking. With this view, this novel study on Ti-6Al-4V machining compares conventional flood coolant with MQL and liquid carbon dioxide (LCO₂) as a cryogenic coolant based on the machining performance and Life Cycle Assessment (LCA) analysis. Though lower impacts on the environment are observed for MQL machining, it is not sustainable as it has been observed 75% reduced tool life with a higher cutting force and surface roughness in comparison with flood and cryogenic machining. The flood machining is found to be non-sustainable as it has more than 50% of total impacts generated for most of the ReCiPe 2016 (H) midpoint categories. Thus, cryogenic machining is emerged as sustainable machining to have a good balance between machining performance and impacts on the environment for turning Ti-6Al-4V.

需要开发可持续的制造工艺，在经济可行性和环境保护之间取得良好的平衡，这是制造商面临的主要挑战之一。加工过程中使用的传统碳基切削液因对生态的影响较大而被发现是不可持续的，因此需要开发替代的可持续切削液策略。然而，基于可持续性的所有支柱，即加工性能、环境影响和人类健康，比较传统、低温和微量润滑 (MQL) 加工的研究仍然缺乏。有鉴于此，这项关于 Ti-6Al-4V 加工的新颖研究将传统的溢流冷却液与 MQL 和液态二氧化碳 (LCO ₂) 作为基于加工性能和生命周期评估 (LCA) 分析的低温冷却剂。尽管观察到 MQL 加工对环境的影响较小，但它是不可持续的，因为与洪水和低温加工相比，它的刀具寿命缩短了 75%，切削力和表面粗糙度更高。洪水加工被发现是不可持续的，因为它对大多数 ReCiPe 2016 (H) 中点类别产生的总影响超过 50%。因此，低温加工成为可持续加工，在加工性能和对环境的影响之间取得良好的平衡，用于车削 Ti-6Al-4V。