Environmental, technological and economical aspects of cryogenic assisted hard machining operation of inconel 718: A step towards green manufacturing

It is critical in today's modern manufacturing era to have a machining system that is both environmentally and economically beneficial. It is therefore necessary in many ways to illustrate a relationship between technological, economic and sustainability measures in the machining of Inconel 718. In present investigation, the experimental studies are incorporated by the use of the dry and MQL (minimum quantity lubrication) environments, as well as cryogenic-LN₂ and cryogenic-CO₂ environments. In terms of technological, sustainability, and economic metrics, the results show that cryogenic-LN₂ performed better, followed by cryogenic-CO₂, MQL, and dry conditions. As turning Inconel 718, LN₂ assisted machining reduce total machining costs and energy usage considerably when compared to dry, MQL, cryogenic-CO₂ environments. In addition, the LN₂ cooling environment has been shown to significantly reduce machining outputs such as cutting force, tool wear, and surface roughness. LN₂ conditions was found to be most promising as it has decreased the cutting force by 32.1%, tool flank wear by 33.33% and total energy consumption by 18% compared to dry machining conditions. It's worth noting that modern lubri-cooling technologies help the aerospace sector be more sustainable by decreasing resource consumption, enhancing environmental advantages, and improving machining features.