Faster methods for estimating arc centre position during VAR and results from Ti-6Al-4V and INCONEL 718 alloys

Bindu Gopinathan Nair, N Winter, B Daniel, Mark Ward

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1 Citation (Scopus)
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Abstract

Abstract. Direct measurement of the flow of electric current during VAR is extremely difficult due to the aggressive environment as the arc process itself controls the distribution of current. In previous studies the technique of “magnetic source tomography” was presented; this was shown to be effective but it used a computationally intensive iterative method to analyse the distribution of arc centre position. In this paper we present faster computational methods requiring less numerical optimisation to determine the centre position of a single distributed arc both numerically and experimentally. Numerical validation of the algorithms were done on models and experimental
validation on measurements based on titanium and nickel alloys (Ti6Al4V and INCONEL 718). The results are used to comment on the effects of process parameters on arc behaviour during VAR
Original languageEnglish
Number of pages8
JournalIOP Conference Series: Materials Science and Engineering
Volume143
Issue number1
DOIs
Publication statusPublished - 17 Aug 2016

Bibliographical note

This is an open-access journal publication of a paper originally presented at a conference

Keywords

  • VAR
  • Ti-6Al-4V
  • IN718
  • Tomography
  • ARC

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