A mathematical model of gas tungsten arc welding considering the cathode and the free surface of the weld poolA mathematical model of GTA welding arc considering cathode and free surface of weld pool

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A two-dimensional axisymmetric numerical model, including the influence of the cathode and the free surface of the weld pool, is developed to describe the heat transfer and fluid flow in gas tungsten are (GTA) welding. In the model, a boundary-fitted coordinate system is adopted to precisely describe the cathode shape and deformed weld-pool surface. The current continuity equation has been solved with the combined are plasma-cathode system, independent of the assumption of current density distribution on the cathode surface, which was essential in the previous studies of are plasma. It has been shown that the temperature profile, the current, and the heat flux to the anode show good agreement with the experimental data. Moreover, the current and the heat-flux distributions may be affected by the shape of the cathode and the free surface of the weld pool.
Publisher
Springer
Issue Date
1997-08
Language
English
Article Type
Article
Keywords

TEMPERATURE

Citation

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, v.28, no.4, pp.679 - 686

ISSN
1073-5615
URI
http://hdl.handle.net/10203/2158
Appears in Collection
ME-Journal Papers(저널논문)
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