This article presents a three-dimensional (3D) mathematical model for the plasma arc in gas tungsten arc welding (GTAW). The velocity, pressure, temperature, electric potential, current density, and magnetic field of the plasma arc are calculated by solving the mass, momentum, and energy conservation equations coupled with electromagnetic equations. The predicted results were compared with the published experimental data and good agreements were achieved. This 3D model can be used to study a nonaxisymmetric arc that may be caused by the presence of nonaxisymmetric weld pools, joint configurations, and perturbations such as an external magnetic field. This study also provides a method to calculate 3D arc pressure, heat flux, and current density on the surface of the weld pool which, if coupled with a weld pool model, will become a complete model of GTAW.
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June 2012
Research Papers
Modeling Three-Dimensional Plasma Arc in Gas Tungsten Arc Welding
G. Xu,
G. Xu
Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology (Formerly University of Missouri-Rolla)
, 1870 Miner Circle, Rolla, MO 65409
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J. Hu,
jjhu@bridgeport.edu
J. Hu
Department of Mechanical Engineering, University of Bridgeport
, Bridgeport, CT 06604
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H. L. Tsai
H. L. Tsai
Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology (Formerly University of Missouri-Rolla)
, 1870 Miner Circle, Rolla, MO 65409
Search for other works by this author on:
G. Xu
Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology (Formerly University of Missouri-Rolla)
, 1870 Miner Circle, Rolla, MO 65409
J. Hu
Department of Mechanical Engineering, University of Bridgeport
, Bridgeport, CT 06604jjhu@bridgeport.edu
H. L. Tsai
Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology (Formerly University of Missouri-Rolla)
, 1870 Miner Circle, Rolla, MO 65409J. Manuf. Sci. Eng. Jun 2012, 134(3): 031001 (13 pages)
Published Online: April 25, 2012
Article history
Received:
June 7, 2010
Revised:
December 13, 2011
Published:
April 24, 2012
Online:
April 25, 2012
Citation
Xu, G., Hu, J., and Tsai, H. L. (April 25, 2012). "Modeling Three-Dimensional Plasma Arc in Gas Tungsten Arc Welding." ASME. J. Manuf. Sci. Eng. June 2012; 134(3): 031001. https://doi.org/10.1115/1.4006091
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