Electrical discharge machining characteristics of Ti-6Al-4V alloy

Biing Hwa Yan, Fu Ten Shieh

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In order to reveal the electrical discharge machining (EDM) of titanium alloy, a series EDM tests on commercial product Ti-6Al-4V with graphite and copper used as the tool electrode materials were carried out at different parameters such as discharge current and pulse duration. The relationships between these factors and material removal rate, surface roughness, enlargement and heat-affected layer were investgated. The following main results were obtained. From the view point of metal removal rate using graphite electrode with negative polarity is remarkably larger than the copper electrode. But from the view point of surface roughness copper electrode is better than graphite electrode. The thickness of heat-affected layer increases with increasing pulse duration and discharge current, especially, when the pulse duration is large enough, the heat-affected layer becomes severely.

Original languageEnglish
Pages (from-to)644-649
Number of pages6
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Issue number11
StatePublished - 1992


  • electrical discharge machining
  • electrode material
  • heat-affected layer
  • removal rate
  • Ti-6A1-4V alloy


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