{"title":"Modeling of Material Removal on Machining of Ti-6Al-4V through EDM using Copper Tungsten Electrode and Positive Polarity","authors":"M. M. Rahman, Md. Ashikur Rahman Khan, K. Kadirgama M. M. Noor, Rosli A. Bakar","volume":47,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1319,"pagesEnd":1325,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/6939","abstract":"This paper deals optimized model to investigate the\r\neffects of peak current, pulse on time and pulse off time in EDM performance on material removal rate of titanium alloy utilizing copper tungsten as electrode and positive polarity of the electrode. The experiments are carried out on Ti6Al4V. Experiments were\r\nconducted by varying the peak current, pulse on time and pulse off time. A mathematical model is developed to correlate the influences of these variables and material removal rate of workpiece. Design of\r\nexperiments (DOE) method and response surface methodology\r\n(RSM) techniques are implemented. The validity test of the fit and adequacy of the proposed models has been carried out through\r\nanalysis of variance (ANOVA). The obtained results evidence that as\r\nthe material removal rate increases as peak current and pulse on time\r\nincreases. The effect of pulse off time on MRR changes with peak ampere. The optimum machining conditions in favor of material removal rate are verified and compared. The optimum machining\r\nconditions in favor of material removal rate are estimated and verified with proposed optimized results. It is observed that the developed model is within the limits of the agreeable error (about\r\n4%) when compared to experimental results. This result leads to desirable material removal rate and economical industrial machining to optimize the input parameters.","references":"[1] M. Armendia, A. Garay, L.M. Iriarte and P.J. 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