PERFORMANCES OF MACHINING PARAMETERS DURING DRY TURNING OF AL-SI ALLOY BASED 5% SIC NANO- PARTICLE REINFORCED NANO – COMPOSITE MATERIAL

The objective of the present study is to know the influences of machining parameters during dry turning of cast Al-Si based (A365 aluminium alloy) SiC (5%) reinforced NANO – composite material through ANOVA (Analysis of variance). The NANO – composite material was produced by stir casting process. The selected machining parameters were speed, feed and depth of cut (DOC) and the chosen experimental plan was as per Taguchi's L9 orthogonal array. The machining was performed on the lathe using the Tungaloy made coated carbide insert. The DOC was the highest contributing parameter both for material removal rate (MRR) maximization as well as for surface roughness (Ra) minimization according to the results of ANOVA. For MRR maximization, feed and speed influenced to some extent. However, influences of speed and feed were insignificant during the machining of the NANO – composite for surface roughness minimization. At low DOC, improper mode of variation of chip reduction coefficient (CRC) with respect to speed was observed. But, proper mode of variation of CRC with respect to speed is obtained at moderate and high DOC. Proper variation of Ra with respect to speed is not at all observed under any experimental condition because of NANO – particle emission during the machining work