A Comparative Study of Nano—MQL and MQL on Chip Morphology and Shear Angle Under High Speed Turning of Inconel 718: For a Sustainable Machining

In this paper discussed the sustainable machining in terms of systematic utilization of Minimum Quantity Lubrication (MQL) and Nano MQL technique during high-speed turning of Inconel 718. The experimental study analyzed the effect of different cooling techniques, cutting speed, flow rate and weight percentage of nano particles on chip morphology and shear angle. Chip formation and its morphology provides in depth knowledge about the material deformation and cutting energy utilization whereas shear angle gives information about plastic deformation while cutting. There are four input parameters considered for the experimentations and experimental plan was designed based on the L18 orthogonal array. A triangular shaped WC based TiAlN coated inserts were selected for machining. Higher chip thickness ratio observed in case of MQL at lower cutting speed whereas as in NMQL at higher cutting speed. Short and snared chips are provided in case of nano MQL at higher cutting speed and whereas coil and continuous chips are produce at lower cutting speed in MQL environment. However, higher shear angle is observed in case of nano MQL than the MQL.