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Prediction of surface roughness of ti-6al-4v in electrical discharge machining: a regression model

Khan, Md. Ashikur Rahman 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 various electrical discharge machining (EDM) parameters and performance characteristics by utilizing relevant experimental data obtained through experimentation. In addition to the effect of peak ampere, the effect of pulse on time and pulse off time on surface roughness has also been investigated. Experiments have been conducted on titanium alloy Ti-6Al-4V with a copper electrode retaining negative polarity as per the Design of Experiments. Response surface methodology techniques are utilized to develop the mathematical model as well as to optimize the EDM parameters. An analysis of variance 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 a fine surface until a certain value, beyond which the surface finish deteriorates. The excellent surface finish is investigated in this study for the case of pulse on time below 80 μs. This result acts as a guide for selecting the required process outputs and most economic industrial machining conditions for optimizing the input factors.

Item Type: Article (Journal)
Additional Information: 6103/50006
Uncontrolled Keywords: Ti-6Al-4V; EDM; pulse on time; pulse off time; single order model; surface finish.
Subjects: T Technology > T Technology (General) > T173.2 Technological change
T Technology > TJ Mechanical engineering and machinery > TJ1125 Machine shops and machine shop practice
T Technology > TJ Mechanical engineering and machinery > TJ227 Machine design and drawing
T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Prof Dr. M A Maleque
Date Deposited: 25 Apr 2016 14:44
Last Modified: 21 Jul 2016 09:30
URI: http://irep.iium.edu.my/id/eprint/50006

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