Experimental Investigations of Vegetable Oil Based Cutting Fluids with Extreme Pressure Additive in Machining of AISI 1040 Steel

The application of conventional cutting fluids in machining operations is harmful and not eco-friendly. In this context, the present work focuses on environmental friendly cutting fluids such as vegetable oil based cutting fluids (VBCFs). The objective of this work is to determine the influence of vegetable oil based cutting fluids (sesame and coconut oil) with extreme pressure (EP) additive on machining performance. Cutting forces, cutting tool temperature, tool flank wear and surface roughness are measured during turning of AISI 1040 steel with coated carbide tool. Machining performance of VBCFs with EP additive is compared with conventional cutting fluid and VBCFs without EP additive. The results indicated that sesame and coconut oils with EP additive improved machining performance compared to other lubrication conditions. Coconut oil with EP additive decreased the feed force by 31%, thrust force 28%, cutting force 20%, cutting tool temperature 7% and tool flank wear 34% and surface quality increased by 33% compared to sesame oil with EP