Prediction of surface roughness of Ti-6Al-4V in electrical discharge machining: A regression model

Rahman Khan, Md. Ashikur and Rahman, M. M. and Kadirgama, Kumaran and Maleque, Md. Abdul and Ishak, M. (2011) Prediction of surface roughness of Ti-6Al-4V in electrical discharge machining: A regression model. Journal of Mechanical Engineering and Sciences (JMES), 1. pp. 16-24. ISSN 2231-8380

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Abstract

This paper develops a single order mathematical model for correlating the various electrical discharge machining (EDM) parameters and performance characteristics utilizing relevant experimental data as obtained through experimentation. Besides the effect of the peak ampere, pulse on time and pulse off time on surface roughness has been investigated. Experiments have been conducted on titanium alloy Ti-6Al-4V with copper electrode retaining negative polarity as per Design of experiments (DOE). Response surface methodology (RSM) techniques are utilized to develop the mathematical model as well as to optimize the EDM parameters. Analysis of Variance (ANOVA) has been performed for the validity test of fit and adequacy of the proposed models. It can be seen that increasing pulse on time causes the fine surface until a certain value and afterward deteriorates in the surface finish. The excellent surface finish is investigated in this study in the case of the pulse on time below 80 µs. This result guides to pick the required process outputs and economic industrial machining conditions optimizing the input factors

Item Type:	Article (Journal)
Additional Information:	6103/17153
Uncontrolled Keywords:	Ti-6Al-4V, EDM, Pulse on time, Pulse off time, single order model, surface finish.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA197 Engineering meteorology T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Prof Dr. Md Abdul Maleque
Date Deposited:	31 Jan 2012 16:13
Last Modified:	01 Feb 2012 10:40
URI:	http://irep.iium.edu.my/id/eprint/17153

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