An investigation on effects of wire-EDT machining parameters on surface roughness of INCONEL 718

This paper studied the effects of machining parameters on surface roughness of wire EDT of INCONEL 718 super alloy. The investigated machining parameters were rotational speed, pulse-on time, pulse-off time, servo voltage, wire feed rate and flushing pressure. Analysis of variance (ANOVA) technique was used to find out the most significant parameters affecting the surface roughness. Results from ANOVA show that pulse-on time is significant variables to surface roughness of wire-EDT INCONEL 718 alloy. The surface roughness of the test specimen increased as these variables increased. Lastly, regression model was developed using a regression method to formulate the machining parameters to the surface roughness. The developed model was validated with an optimal setting parameters and the maximum prediction error of the model was less than 8%. (C) 2019 Elsevier Ltd. All rights reserved.

Automated summary

This study investigated the effects of machining parameters on the surface roughness of wire EDM of INCONEL 718 super alloy. Through ANOVA analysis, it was found that pulse-on time was the most significant parameter affecting surface roughness. A regression model was developed to relate machining parameters to surface roughness, with a maximum prediction error of less than 8% validated with optimal setting parameters.