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Influence of Dielectric Type on Porosity Formation on Electrical Discharge Machined Surfaces

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Abstract

This work presents a comparative study on the performance of three types of dielectrics at different electrical discharge machining (EDM) parameter combinations favorable for generating porosity. The characteristics of the porosity formation in the recast layer formed in water/oil emulsions (W/O) were investigated by comparing them with those present in the recast layer formed in kerosene and deionized water dielectric. The results showed that the porosity characters were influenced significantly by the dielectric type. The formation mechanism of the porosity in different dielectrics is presented in this article.

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Acknowledgments

The work is supported partially by a grant from Chinese National Natural Science Foundation (Grant No. 50675225) and a grant from Department of Science & Technology of Shandong Province (Grant No. 2006GG2204001).

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Authors and Affiliations

  1. College of Electromechanical Engineering, China University of Petroleum, Dongying, 257061, P.R. China

    Yanzhen Zhang (Ph.D. Candidate), Yonghong Liu (Professor), Renjie Ji (Lecturer), Baoping Cai (Ph.D. Candidate) & Hang Li (Ph.D. Candidate)

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  1. Yanzhen Zhang
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  2. Yonghong Liu
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  3. Renjie Ji
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  4. Baoping Cai
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  5. Hang Li
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Corresponding author

Correspondence to Yonghong Liu.

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Manuscript submitted September 25, 2011.

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Zhang, Y., Liu, Y., Ji, R. et al. Influence of Dielectric Type on Porosity Formation on Electrical Discharge Machined Surfaces. Metall Mater Trans B 43, 946–953 (2012). https://doi.org/10.1007/s11663-012-9653-3

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  • DOI: https://doi.org/10.1007/s11663-012-9653-3

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