Multi-objective optimization of EDM process for titanium alloy

Electro-discharge machining (EDM) is a widely used process for manufacturing industries. It is a non-conventional machining process, where material is removed by the thermal energy of the generated electrical sparks between the electrode and workpiece. It is generally used to machine high strength temperature-resistance alloys which are difficult-to-machine. Titanium alloys being a difficult-to-machine alloy, is generally used for parts in aero-space industries, thus its machining should have a higher material removal rate, lower tool wear rate with better surface finish. To achieve these suitable machining responses the process is successfully optimized using Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). (C) 2019 Elsevier Ltd. All rights reserved.