Performance and Surface Integrity of Ti6Al4V After Sinking EDM with Special Graphite Electrodes View Full Text


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Article Info

DATE

2014-04

AUTHORS

Fred L. Amorim, Leandro J. Stedile, Ricardo D. Torres, Paulo C. Soares, Carlos A. Henning Laurindo

ABSTRACT

Titanium and its alloys have high chemical reactivity with most of the cutting tools. This makes it difficult to work with these alloys using conventional machining processes. Electrical discharge machining (EDM) emerges as an alternative technique to machining these materials. In this work, it is investigated the performance of three special grades of graphite as electrodes when ED-Machining Ti6Al4V samples under three different regimes. The main influences of electrical parameters are discussed for the samples material removal rate, volumetric relative wear and surface roughness. The samples surfaces were evaluated using SEM images, microhardness measurements, and x-ray diffraction. It was found that the best results for samples material removal rate, surface roughness, and volumetric relative wear were obtained for the graphite electrode with 10-μm particle size and negative polarity. For all samples machined by EDM and characterized by x-ray (XRD), it was identified the presence of titanium carbides. For the finish EDM regimes, the recast layer presents an increased amount of titanium carbides compared to semi-finish and rough regimes. More... »

PAGES

1480-1488

References to SciGraph publications

  • 2010-05. Comparative study of different dielectrics for micro-EDM performance during microhole machining of Ti-6Al-4V alloy in THE INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
  • 2011-02. The performance of PCD tools in high-speed milling of Ti6Al4V in THE INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
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    http://scigraph.springernature.com/pub.10.1007/s11665-013-0852-0

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    http://dx.doi.org/10.1007/s11665-013-0852-0

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