Cooling Techniques Focusing on Minimum Quantity Lubrication (MQL) and Solid Lubricant (SL) Methods to Enhance the Machinability and Sustainability of Magnesium Alloys: A Comprehensive Review

This literature review explores the well-recognized role of cutting fluids in machining operations, highlighting their importance for effective cooling and lubrication. While mineral-based cutting fluids are commonly used in industry, they are not environmentally friendly or healthy. Therefore, there is a pressing need to implement sustainable cooling and lubrication systems that are beneficial to the environment and enhance machinability. This review presents various sustainable alternatives to traditional flood cooling applications, including minimum quantity lubrication (MQL), nanofluids-MQL, and cryogenic-MQL. Research indicates that advancements in MQL offer several advantages over conventional dry and flooded cooling methods. MQL can provide clear guidelines for incorporating solid lubricants, often in nanoparticle form, to improve heat transfer, lubrication, tool life, material disposal, and sustainability. Continued research and development are essential to address existing challenges and unlock the full potential of these innovative cooling and lubrication techniques.