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Melt Flow and Mass Transfer in Hybrid Laser-GMA Welding of 304 Stainless Steels

[+] Author Affiliations
Jun Zhou

Pennsylvania State University, Erie, PA

Hai-Lung Tsai

Missouri University of Science and Technology, Rolla, MO

Paper No. FEDSM2013-16158, pp. V01CT27A001; 5 pages
doi:10.1115/FEDSM2013-16158
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

In recent years, hybrid laser-arc welding has been developed and applied in many applications because of its advantages over laser welding and arc welding alone, which is mainly due to the synergic effect of laser and arc. Although some progress has been made in the development of hybrid laser-arc welding technique, lack of understanding of some fundamental principles in this emerging joining technique has hindered its further development and advancement. For example, in hybrid laser welding, one way to prevent/eliminate cracking is to add filler metal with anti-cracking element and diffuse them well into the weld pool in welding. Thus, the mass loss can be compensated and compositional and mechanical properties of the welds can be improved. Understanding the mass transfer in molten pool is vital to achieve these desired objectives. In this paper, melt flow and mass transfer in hybrid laser-GMA keyhole welding will be investigated. Mathematical models will be developed to investigate melt flow, energy transport, and mass transfer in hybrid laser-GMA keyhole welding. The effects of welding parameters like feed wire diameter and welding current on melt flow and mass transfer in weld pool will be discussed.

Copyright © 2013 by ASME

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