LAUSR

The present study investigated the effect of different machining environments such as dry, wet, cryogenic cooling, minimum quantity lubrication (MQL), Al2O3 nanofluids with MQL, CuO nanofluids with MQL and Al–CuO hybrid nanofluids with MQL on machining performance characteristics during turning of EN-24 steel. The nanofluids and hybrid nanofluids were prepared by adding different weight percentages (0.2 wt%, 0.4 wt%, 0.6 wt%) of Al2O3, CuO and Al–CuO to the soluble oil. The thermal and tribological properties of soluble oil, nanofluids and hybrid nanofluids were analysed. The thermal conductivity of Al–CuO hybrid nanofluids was more compared with Al2O3, CuO nanofluids. The specific heat of Al–CuO hybrid nanofluids was less compared with Al2O3, CuO nanofluids. The comparative analysis of machining performance was done during turning under different environments. Experimental results reveal that the turning performance under Al–CuO hybrid nanofluids with MQL was better as compared to other machining environments.