Effects of Minimum Quantity Lubrication (MQL) on Chip Formation Mode, Tool Wear, and Surface Roughness in Turning AISI-1040 Steel with Uncoated Carbide Tool

This research work was carried out with the view of investigating the effects of minimum quantity lubrication (MQL) on the cutting performance of AISI 1040 steel, in terms of chip formation mode, tool wear, and machined surface roughness as compared to completely dry and wet machining. In this study, the minimum quantity lubrication was provided with a spray of air and cutting oil. However, compared to the dry and wet machining, MQL machining performed much better, mainly due to substantial reduction in cutting zone temperature enabling favorable chip formation and chip-tool interaction. It also provides substantial reduction in tool wear, which enhanced the tool life, and surface roughness. Furthermore, it provides environment friendliness and improves the machinability characteristics.