Prediction of surface temperature on metal beads subjected to argon-hydrogen transferred arc plasma impingement

Agustin M. Fudolig, Hiroshi Nogami, Jun Ichiro Yagi, Kouji Mimura, Minoru Isshiki

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Surface temperatures of metals subjected to transferred arc plasma impingement in 100% argon and Ar-H2 (90:10 and 70:30 by volume) mixed gas arc plasmas are predicted based on a combined mathematical model of the arc plasma and the metal bead. The numerical simulation involves solution to conservation equations of mass, momentum, energy, and current continuity of the arc plasma and the target metals of Nb and Ta. An increase in hydrogen content of the introduced gas resulted to higher surface temperatures as well as an increase in the size of the molten pool. Predicted threshold arc current that causes an onset of melting is in good agreement with experiment.

Original languageEnglish
Pages (from-to)623-629
Number of pages7
JournalIsij International
Volume37
Issue number6
DOIs
Publication statusPublished - 1997

Keywords

  • Metal refining
  • Mixed-gas plasma
  • Numerical simulation
  • Surface temperature

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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