Surface modification by EDM using Co-Cr sintered powder metallurgy electrode

Khan, Ahsan Ali and Mohammed , Baba Ndaliman and Ali, Mohammad Yeakub and Mansor, Mas Hafizah and Idrus, Nurul-Ain (2012) Surface modification by EDM using Co-Cr sintered powder metallurgy electrode. Advanced Materials Research, 576. pp. 56-59. ISSN 1022-6680

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Abstract

In this investigation, the powder metallurgy (PM) electrode developed from cobalt (Co)and chromium (Cr) powders was used in electrical discharge machining (EDM). This new Co-Cr sintered electrode was used to machine mild steel workpiece with kerosene dielectric fluid. The main objective is to modify its surface characteristics and secure increased surface hardness. The EDM variables of peak current, pulse duration and pulse interval were applied to investigate these surface properties. Scanning electron microscopy (SEM) / energy dispersive X-ray (EDX)spectroscopy analysis confirmed migration of electrode materials (Co and Cr) onto the EDMed surface. Improved hardness was obtained on the mild steel, the highest being 85.3 HRB. Thus, the Co-Cr electrode introduced into the EDM has the capability of modifying the mild steel surface.

Item Type:	Article (Journal)
Additional Information:	3129/25669
Uncontrolled Keywords:	EDM, Co-Cr electrode, surface modification, powder metallurgy
Subjects:	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. Ahsan Ali Khan
Date Deposited:	07 Sep 2012 14:20
Last Modified:	10 Jul 2014 10:58
URI:	http://irep.iium.edu.my/id/eprint/25669

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