Abstract
The dynamic behavior of stationary fully penetrated gas tungsten arc weld pools was investigated through numerical simulation. The effects of arc pressure, electromagnetic force, and surface tension gradients on surface depression, convection, and temperature distribution were calculated. The top surfaces of fully penetrated pools were easily depressed since they were only supported by surface tension. Circulatory convection patterns were generated by electromagnetic forces and surface tension gradients and were significantly affected by the vertical velocity component produced by pool oscillation. The temperature distribution in and around the pool was influenced by pool convection. During pool formation and growth, the fully penetrated molten pool sagged dramatically when the bottom pool diameter approached the top diameter. The sagged pool oscillated with higher magnitude and lower frequency than partially penetrated or fully penetrated pools before sagging occurred. The dynamic behavior and the amount of material lost during melt-through were affected by the pool size and the magnitude of arc pressure.
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References
C.R. Heiple and J.R. Roper: Weld. J., 1982, vol. 61(4), pp. 97s-102s.
R.J. Renwick and R.W. Richardson: Weld. J., 1983, vol. 62(2), pp. 29s-35s.
G.M. Oreper, T.W. Eagar, and J. Szekely: Weld. J., 1983, vol. 62(11), pp. 307s-312s.
S. Kou and Y.H. Wang: Weld. J., 1986, vol. 65(3), pp. 63s-70s.
T. Zacharia, S.A. David, J.M. Vitek, and T. Debroy: Weld. J., 1989, vol. 68(12), pp. 499s-509s.
T. Zacharia, A.H. Eraslan, and D.K. Aidun: Weld. J., 1988, vol. 67(1), pp. 18s-27s.
M.C. Tsai and S. Kou: Weld. J., 1990, vol. 69(6), pp. 241s-246s.
S.D. Kim and S.-J. Na: Weld. J., 1992, vol. 71(5), pp. 179s-193s.
M.L. Lin and T.W. Eagar: Weld. J., 1985, vol. 64(6), pp. 163s-169s.
R.T.C. Choo, J. Szekely, and R.C. Westhoff: Weld. J., 1990, vol. 69(9), pp. 346s-361s.
S.K. Choi, S.H. Ko, C.D. Yoo, and Y.S. Kim: Weld. J., 1998, vol. 77(1), pp. 45s-51s.
C.W. Hirt and B.D. Nichols: J. Computational Phys., 1981, vol. 39, pp. 201–25.
Y. Chen, S.A. David, T. Zacharia, and C.J. Cremers: Numerical Heat Transfer, 1998, Part A, vol. 33, pp. 599–620.
S.H. Ko, S.K. Choi, and C.D. Yoo: unpublished research.
H.G. Fan and R. Kovacevic: J. Phys. D: Appl. Phys., 1999, 32, 2902–2909
H.G. Fan and R. Kovacevic: Metal. Mater. Trans. B, 1999, vol. 30B, pp. 791–801.
R.T.C. Choo and J. Szekely: Weld. J., 1991, vol. 70(9), pp. 223s-233s.
E.A. Brandes and G.B. Brook: Smithells Metals Reference Book, 7th ed., Butterworth-Heinemann Ltd., London, 1992.
S. Kou: Transport Phenomena and Materials Processing, Wiley & Sons, New York, NY, 1996, p. 513.
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Ko, S.H., Yoo, C.D., Farson, D.F. et al. Mathematical modeling of the dynamic behavior of gas tungsten arc weld pools. Metall Mater Trans B 31, 1465–1473 (2000). https://doi.org/10.1007/s11663-000-0031-1
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DOI: https://doi.org/10.1007/s11663-000-0031-1