Multi-objective optimization of WEDM process by hybrid methodology. (2020)

• Record Type: Journal Article
• Authors: Priyadarshini, Manisha; Behera, Ajit; Kumar Biswas, Chandan; Swain, Biswajit; Patel, Swadhin
• Is Part Of: Materials today. Volume 33:Part 8(2020)
• Page Start: 5511
• Page End: 5513
• Publication Date: 2020
• Subjects: WEDM -- Material removal -- Kerf width -- Machining -- Fizzy -- TOPSIS; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.03.321
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Wire electro-discharge machining (WEDM) is an extensively used non-conventional, thermo-electrical machining process where the generated energy from the electrical sparks that occur in the tool-workpiece interface melts and removes the metal from the workpiece. It is largely used in machining difficult-to-cut temperature-resistant alloys, which have high strength. The workpiece material is taken as AISI P20 tool steel, a special purpose tool steel that is used to make plastic dies and molds. This has high wear-resistance, toughness and hardness. Servo voltage ( Sv ), Peak current ( Ip ), Pulse-off-time ( Toff ) and Pulse-on-time ( Ton ) are taken as process parameters and Kerf Width (KW) together with Material Removal Rate (MRR) are considered as the responses. In order to attain the optimum processing condition, Fuzzy- Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), a hybrid multi-objective optimization technique is used.