Modeling of hybrid laser-MIG keyhole welding process

Jun Zhou, H. L. Tsai, P. C. Wang, R. J. Menassa, S. P. Marin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Recently, hybrid laser-MIG welding technology has increasingly attracted interest in both industry and academia. By combining the two welding processes, it can modify the weld bead shape including the elimination of undercut, change the weld compositions, reduce the porosity, improve welding bridgeability, decrease the susceptibility of hot cracking, and increase welding speed. So far, the development of laser-MIG welding technology has been based on the trial-and-error procedure. In this paper, mathematical models and the associated numerical techniques have been developed to simulate the laser-MIG welding process. The transient keyhole dynamics, interaction between droplets and weld pool, and the shape and composition of the solidified weld were predicted for a three-dimensional moving laser-MIG welding. The heat and mass transfer and fluid flow in molten metal and temperature distribution inside the keyhole were studied. In the model, the volume-of-fluid (VOF) method was employed to track free surfaces. The Inverse Bremsstrahlung absorption of laser energy inside plasma, Fresnel absorption and the multiple reflections at the keyhole wall, and the thermal radiation by the plasma in the keyhole were all considered. Computer animations showing the fluid flow, weld pool dynamics, and the interaction between droplets and weld pool will be shown in the presentation.

Original languageEnglish (US)
Title of host publicationICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings
StatePublished - Dec 1 2003
EventICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics - Jacksonville, FL, United States
Duration: Oct 13 2003Oct 16 2003

Publication series

NameICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings

Other

OtherICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics
CountryUnited States
CityJacksonville, FL
Period10/13/0310/16/03

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Electrical and Electronic Engineering

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  • Cite this

    Zhou, J., Tsai, H. L., Wang, P. C., Menassa, R. J., & Marin, S. P. (2003). Modeling of hybrid laser-MIG keyhole welding process. In ICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings [1001] (ICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings).