Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 18 (2019) 3606–3616 www.materialstoday.com/proceedings 2214-7853 © 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the 9th International Conference of Materials Processing and Characterization, ICMPC-2019 ICMPC-2019 Multi-objective Optimization of a Hybrid Machining Process Abrasive Powder Mixed WEDM of Inconel 718 using Particle Swarm Optimization Technique A. Ranjan a* , S. Chakraborty b , D. Kumar c , D. Bose d a Research scholar, IIT Kharagpur, Kharagpur, 721302, India b Teachig assistant, NITTTR Kolkata, Kolkata 700106, India c Research scholar, Jadavpur University, Kolkata, 700032, India d Professor, NITTTR Kolkata, Kolkata, 700106, India Abstract Abrasive powder mixed Electrical discharge machining is a hybrid machining process providing both thermal and mechanical interactions. Addition of abrasive powders provides better discharge distribution along-with the abrasive action in dielectric. This paper analyses the effect of different parameters as Pulse on time, Pulse off time, Peak current and Gap voltage along-with the powder particle size and its concentration on MRR and SR while machining Inconel 718. SiC and Al 2 O 3 powders are investigated here. Regression analysis has been done to model responses and then their optimization is performed through PSO. Finally, the betterment has been proved through confirmation experiments. © 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the 9th International Conference of Materials Processing and Characterization, ICMPC-2019 Keywords: PMWEDM, SiC, Al 2 O 3 , Multi-response Optimization(PSO), MRR, SR 1. Introduction Inconel 718 is a Nickel-chromium alloy that has numerous properties including high strength and corrosion resistance even at an elevated temperature range from -423̊ F to 1300̊ F. Its resistance to cracking after being welded is very high. Its high fatigue, creep and rupture strength enables it to be used in numerous engineering applications likes: cryogenic tanks, gas turbine engines, parts of aircraft body etc [3]. But the high strength and work hardening characteristic of the alloy makes it difficult to machine through any conventional machining process. The cutting forces will keep increasing as machining prolongs if it is machined through any conventional machining. * Corresponding author. Tel.: +91-8802141487 E-mail address: anandranjan@iitkgp.ac.in