Optical emission spectroscopy of metal vapor dominated laser-arc hybrid welding plasma

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3552307· OSTI ID:21560163

Ribic, B; DebRoy, T ^[1]; Burgardt, P ^[2]

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1. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

During laser-arc hybrid welding, plasma properties affect the welding process and the weld quality. However, hybrid welding plasmas have not been systematically studied. Here we examine electron temperatures, species densities, and electrical conductivity for laser, arc, and laser-arc hybrid welding using optical emission spectroscopy. The effects of arc currents and heat source separation distances were examined because these parameters significantly affect weld quality. Time-average plasma electron temperatures, electron and ion densities, electrical conductivity, and arc stability decrease with increasing heat source separation distance during hybrid welding. Heat source separation distance affects these properties more significantly than the arc current within the range of currents considered. Improved arc stability and higher electrical conductivity of the hybrid welding plasma result from increased heat flux, electron temperatures, electron density, and metal vapor concentrations relative to arc or laser welding.

• OSTI ID: 21560163
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 8; Other Information: DOI: 10.1063/1.3552307; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ARC WELDING
ELECTRIC ARCS
ELECTRIC CONDUCTIVITY
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
EMISSION SPECTROSCOPY
HEAT FLUX
HEAT SOURCES
ION DENSITY
ION TEMPERATURE
LASER RADIATION
LASER WELDING
METALS
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
STABILITY
VAPORS
CURRENTS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FABRICATION
FERMIONS
FLUIDS
GASES
JOINING
LEPTONS
PHYSICAL PROPERTIES
RADIATIONS
SPECTROSCOPY
WELDING