Analysis of surface roughness in electric discharge machining of incoloy 800ht

This paper analyzes the effect of machining parameters on surface roughness of INCOLOY 800HT using Electric Discharge Machining [EDM]. Response surface methodology [RSM] has been considered for improvement and optimization of the experiments. Box-Behnken design of RSM was used to design and analyze the experiments performed. Current, voltage and pulse on-time were chosen as process parameters to study the influence on surface finish of the material which has been machined. From the analysis of the result, it is revealed that the current is the most significant factor. Surface Roughness [SR] increases with the increase in current, whereas better surface finish is achieved at lower current value.