Quantitative modelling of motion, temperature gyrations, and growth of inclusions in weld pool

T. Hong, W. Pitscheneder, Tarasankar Debroy

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The velocity and temperature fields, the shape and size of the fusion zone, and the motion of the inclusions were calculated by the solution of equations of conservation of mass, momentum, and energy in three dimensions for various welding conditions. The loci and the temperature gyrations experienced by a large number of inclusions were calculated numerically to seek a statistically meaningful residence time distribution of the inclusions and the number of intensities of the temperature cycles experienced by these particles. Finally, both the growth and dissolution of the inclusions were considered to calculate their size distribution. The inclusions experienced considerable recirculatory motion and strong temperature gyrations along their paths in the weld pool. The temperature-time plots for most of the inclusion particles displayed several temperature peaks. However, about one-third of the particles experienced continuous cooling behaviour. The average number of the temperature peaks in the time-temperature plots and the average residence time of inclusions in the weld pool changed significantly with welding conditions. The calculated temperature-time-transformation diagrams of the inclusions showed that the temperature gyrations affected the growth rates and the size distributions of the inclusions. Good agreement between the calculated and measured inclusion size distributions indicates that important aspects of weld metal structure can be understood from the fundamentals of transport phenomena and kinetics.

Original languageEnglish (US)
Pages (from-to)33-41
Number of pages9
JournalScience and Technology of Welding and Joining
Volume3
Issue number1
DOIs
StatePublished - Jan 1 1998

Fingerprint

gyration
Welds
inclusions
Temperature
temperature
welding
Welding
plots
Residence time distribution
loci
conservation
Conservation
Momentum
dissolving
Dissolution
Temperature distribution
temperature distribution
Fusion reactions
velocity distribution
fusion

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "The velocity and temperature fields, the shape and size of the fusion zone, and the motion of the inclusions were calculated by the solution of equations of conservation of mass, momentum, and energy in three dimensions for various welding conditions. The loci and the temperature gyrations experienced by a large number of inclusions were calculated numerically to seek a statistically meaningful residence time distribution of the inclusions and the number of intensities of the temperature cycles experienced by these particles. Finally, both the growth and dissolution of the inclusions were considered to calculate their size distribution. The inclusions experienced considerable recirculatory motion and strong temperature gyrations along their paths in the weld pool. The temperature-time plots for most of the inclusion particles displayed several temperature peaks. However, about one-third of the particles experienced continuous cooling behaviour. The average number of the temperature peaks in the time-temperature plots and the average residence time of inclusions in the weld pool changed significantly with welding conditions. The calculated temperature-time-transformation diagrams of the inclusions showed that the temperature gyrations affected the growth rates and the size distributions of the inclusions. Good agreement between the calculated and measured inclusion size distributions indicates that important aspects of weld metal structure can be understood from the fundamentals of transport phenomena and kinetics.",
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Quantitative modelling of motion, temperature gyrations, and growth of inclusions in weld pool. / Hong, T.; Pitscheneder, W.; Debroy, Tarasankar.

In: Science and Technology of Welding and Joining, Vol. 3, No. 1, 01.01.1998, p. 33-41.

Research output: Contribution to journalArticle

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