Origin of wavy weld boundary

P. S. Wei, C. N. Ting, J. S. Yeh, Tarasankar Debroy, F. K. Chung, G. H. Yan

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In conduction mode laser welding, the shape of the fusion boundary affects the solidification process, microstructure, and properties of the weld. Although significant progress has been made in the calculations of the shape and size of the fusion zone in recent decades, the conditions for the formation of the wavy fusion boundary are still not well understood. Here we examine the conditions for its formation in terms of important dimensionless numbers. In particular, the computed flow patterns, temperature fields, and molten pool shapes under the flat free surface are examined for various values of Marangoni, Prandtl, Peclet, and dimensionless heat input values. In the absence of electromagnetic force, it is shown that the wavy fusion boundary forms for specific ranges of Marangoni and Prandtl numbers.

Original languageEnglish (US)
Article number053508
JournalJournal of Applied Physics
Volume105
Issue number5
DOIs
StatePublished - Mar 24 2009

Fingerprint

fusion
dimensionless numbers
laser welding
Prandtl number
solidification
flow distribution
temperature distribution
electromagnetism
conduction
heat
microstructure

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Wei, P. S., Ting, C. N., Yeh, J. S., Debroy, T., Chung, F. K., & Yan, G. H. (2009). Origin of wavy weld boundary. Journal of Applied Physics, 105(5), [053508]. https://doi.org/10.1063/1.3065533
Wei, P. S. ; Ting, C. N. ; Yeh, J. S. ; Debroy, Tarasankar ; Chung, F. K. ; Yan, G. H. / Origin of wavy weld boundary. In: Journal of Applied Physics. 2009 ; Vol. 105, No. 5.
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Wei, PS, Ting, CN, Yeh, JS, Debroy, T, Chung, FK & Yan, GH 2009, 'Origin of wavy weld boundary', Journal of Applied Physics, vol. 105, no. 5, 053508. https://doi.org/10.1063/1.3065533

Origin of wavy weld boundary. / Wei, P. S.; Ting, C. N.; Yeh, J. S.; Debroy, Tarasankar; Chung, F. K.; Yan, G. H.

In: Journal of Applied Physics, Vol. 105, No. 5, 053508, 24.03.2009.

Research output: Contribution to journalArticle

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AU - Wei, P. S.

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AB - In conduction mode laser welding, the shape of the fusion boundary affects the solidification process, microstructure, and properties of the weld. Although significant progress has been made in the calculations of the shape and size of the fusion zone in recent decades, the conditions for the formation of the wavy fusion boundary are still not well understood. Here we examine the conditions for its formation in terms of important dimensionless numbers. In particular, the computed flow patterns, temperature fields, and molten pool shapes under the flat free surface are examined for various values of Marangoni, Prandtl, Peclet, and dimensionless heat input values. In the absence of electromagnetic force, it is shown that the wavy fusion boundary forms for specific ranges of Marangoni and Prandtl numbers.

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Wei PS, Ting CN, Yeh JS, Debroy T, Chung FK, Yan GH. Origin of wavy weld boundary. Journal of Applied Physics. 2009 Mar 24;105(5). 053508. https://doi.org/10.1063/1.3065533