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Numerical investigations on the thermal efficiency in laser-assisted plasma arc welding

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Abstract

Numerical investigations on the thermal efficiency in laser-assisted plasma arc welding (LAPAW) have been carried out by the combination of a magneto-hydrodynamic (MHD) arc model and a smoothed-particle-hydrodynamics (SPH) model of the weld pool. The comparison of the calculated weld seam cross-sections gained from numerical simulation as well as experimental examinations shows a good agreement. By the use of the weld pool model, the sensitivity of different influencing variables was investigated. The analysis clearly reveals the major influence of the central heat flux density on the penetration profile and on the thermal efficiency of the process. The higher the heat flux of the laser beam and the higher the constriction of the heat flux profile of the arc, the higher the thermal efficiency of the process.

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Funding

The authors appreciate the financial support given by the German Research Foundation (DFG) within the project “Experimentelle und theoretische Analyse des Tiefschweißeffektes beim lasergestützten Plasmaschweißen”, Contract No. BE 1875/34-1 and FU 307/10-1.

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Authors and Affiliations

  1. Technische Universität Dresden, 01062, Dresden, Germany

    S. Jäckel, M. Trautmann, M. Hertel, U. Füssel, D. Hipp & E. Beyer

  2. Fraunhofer Institute of Material and Beam Technology, Winterbergstraße 28, 01277, Dresden, Germany

    A. Mahrle & E. Beyer

Authors
  1. S. Jäckel
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  2. M. Trautmann
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  3. M. Hertel
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  4. U. Füssel
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  5. D. Hipp
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  6. A. Mahrle
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  7. E. Beyer
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Corresponding author

Correspondence to S. Jäckel.

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Recommended for publication by Commission XII - Arc Welding Processes and Production Systems

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Jäckel, S., Trautmann, M., Hertel, M. et al. Numerical investigations on the thermal efficiency in laser-assisted plasma arc welding. Weld World 63, 23–31 (2019). https://doi.org/10.1007/s40194-018-0641-3

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  • DOI: https://doi.org/10.1007/s40194-018-0641-3

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