Please use this identifier to cite or link to this item: https://doi.org/10.1504/IJAT.2009.024396
Title: An experimental investigation on the surface characteristics of tungsten carbide for the fine-finish die-sinking and scanning micro-EDM
Authors: Jahan, M.P.
Wong, Y.S. 
Rahman, M. 
Asad, A.B.M.A.
Keywords: Crater characteristics
Die-sinking micro-EDM
Electrode materials
Fine surface finish
RC-generator
Scanning micro-EDM
Surface characteristics
Surface roughness
Tungsten carbide
Issue Date: 2009
Source: Jahan, M.P.,Wong, Y.S.,Rahman, M.,Asad, A.B.M.A. (2009). An experimental investigation on the surface characteristics of tungsten carbide for the fine-finish die-sinking and scanning micro-EDM. International Journal of Abrasive Technology 2 (3) : 223-244. ScholarBank@NUS Repository. https://doi.org/10.1504/IJAT.2009.024396
Abstract: In this paper, a comprehensive study on the surface characteristics of tungsten carbide (WC) obtained in die-sinking and scanning micro-EDM is presented based on the crater characteristics, surface topography, average surface roughness (RSUB align=righta) and peak-to-valley roughness (RSUB align=rightmax). The investigation shows that fine-finish micro-EDM requires minimisation of the pulse energy supplied into the gap which was found difficult to apply in die-sinking due to frequent arcing, short circuiting and unstable machining conditions. Consequently, the machined surface becomes defective due to the presence of microcracks, voids and deposition of debrises in die-sinking micro-EDM. However, the surface generated in scanning micro-EDM is less susceptible to surface defects along with lower RSUB align=righta and RSUB align=rightmax. Investigation has also been carried out on the effect of different electrode materials on surface characteristics of WC. It was found that silver tungsten electrode provides better surface characteristics compared to tungsten and copper tungsten for the fine-finish micro-EDM of WC. Copyright © 2009, Inderscience Publishers.
Source Title: International Journal of Abrasive Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/59458
ISSN: 17522641
DOI: 10.1504/IJAT.2009.024396
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