Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 4 (2017) 10603–10606 www.materialstoday.com/proceedings 2214-7853 © 2017 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of International Conference on Recent Trends in Engineering and Material Sciences (ICEMS- 2016). ICEMS 2016 Investigation of Material Removal Rate and Tool Wear Rate on Electrical Discharge Machining of Incoloy 800HT by using Response Surface Methodology Sourabh Sinha a* , Raj Ballav b , Amaresh Kumar c a Research Scholar, Department of Manufacturing Engineering, National Institute of Technology, Jamshedpur, 831014, India b,c Associate Professor, Department of Manufacturing Engineering, National Institute of Technology, Jamshedpur, 831014, India Abstract This paper investigates the different machining parameters for the electrical discharge machining (EDM) processes on Incoloy 800HT. A Box-Behnken design of response surface methodology is used to design and analyze the experiments. The experiments intend to study the EDM parameters such as current, voltage and pulse on-time which influences the two major response characteristics namely material removal rate (MRR) and tool wear rate (TWR). The research shows that current is a significant parameter, as if the current increases, there is an increase in material removal rate. Tool wear rate minimizes when the voltage supplied is high. A second order, regression equation using analysis of variance (ANOVA) for each process response is derived which helps in understanding the feasibility and effectiveness of adopted approach. This in turn provides a useful platform to model and optimize MRR and TWR during EDMing Incoloy 800HT. © 2017 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of International Conference on Recent Trends in Engineering and Material Sciences (ICEMS-2016). Keywords: EDM; INCOLOY 800HT; Box-Behnken; ANOVA; Optimization