Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 5 (2018) 4413–4420 www.materialstoday.com/proceedings 2214-7853© 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of 7th International Conference of Materials Processing and Characterization. ICMPC 2017 Optimisation Of Process Parameters Of Electrical Discharge Machining Of Fabricated AA 6061/ 10% Al2 O3 Aluminium Based Metal Matrix Composite Bhaskar Chandra Kandpal 1* , Jatinder Kumar 2 , Hari Singh 3 1 Assistant Professor, Mechanical Engineering Department, IPEC, Ghaziabad, INDIA 2, 3 Department of Mechanical Engineering, National Institute of Technology, Kurukshetra India Abstract As we know non conventional machining methods are used for machining very hard materials and for making difficult shapes.Electrical discharge machining (EDM) process is one of the most commonly used non conventional machining processes for machining hard, brittle materials like composites. It is commonly used in die making industries for developing complex profiles in dies related to sheet metal work, etc. It is commonly used for machining metal matrix composites which are very hard materials. Aluminium based metal matrix composites are widely used in aeronautical and defence parts because of their advanced properties like high strength to weight ratio, etc. At first the material was fabricated using stir casting set up which was the part of research work. The work piece material selected in this study was AA 6061/ 10 %Al2O3 based metal matrix composite which was fabricated by stir casting process with the help of newly developed stir casting set up. After fabrication, the characterisation of samples was done using SEM and mechanical. The EDM process was selected for machining composite samples with input parameters like gap current (A), pulse on time (μs) and duty factor. In this machining process the output response was material removal rate. The optimisation of process parameters was done using Taguchi method with the help of ANOVA test and S/ N ratio. Analysis of variance was performed to find the significance of machining parameters in this experimental work. © 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of 7th International Conference of Materials Processing and Characterization. Keywords: EDM, Material Removal Rate (MRR); gap size, discharge current (I); Pulse on time (Ton);duty factor; Stir casting; AMMC (aluminium based metal matrix composite);Taguchi method; ANOVA. * Corresponding author. E-mail address: kandpalbhaskar2000@gmail.com