MATHEMATICAL MODELLING OF SURFACE ROUGHNESS ON MACHINING OF AA6061-BORONCARBIDE COMPOSITE IN EDM THROUGH RSM

The aim of present study is to investigate the machinability evaluation of AA6061- wt.5% B4Cp metal matrix composite in EDM. For machining of composite, three machining parameters were considered such as current, pulse ontime and pulse offtime. After experimentation, a mathematical model for surface roughness was developed to correlate the influences of these machining parameters and surface roughness (Ra). The experiments were planned as per DOE method. From the obtained results, it was evidenced that the surface roughness is influenced more by current and pulse on time. The best surface finish was obtained at minimum of pulse off time value. The optimum machining parameters in favour of good surface roughness were estimated and verified with proposed optimized results