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Laser Beam Welding With Simultaneous Gaussian Laser Preheating
Journal of Heat Transfer, 1993An analytical solution of the dual, laser beam welding process is presented. It is based on a Gaussian distributed leading heat source for preheating, followed by a line source for the actual welding process. The effect of beam distribution parameters as well as interbeam spacing and relative power intensities on the resulting temperature distribution ...
Y.-N. Liu, E. Kannatey-Asibu
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Laser beam-plasma plume interaction during laser welding
SPIE Proceedings, 2003Laser welding process is unstable because the keyhole wall performs oscillations which results in the oscillations of plasma plume over the keyhole mouth. The characteristic frequencies are equal to 0.5-4 kHz. Since plasma plume absorbs and refracts laser radiation, plasma oscillations modulate the laser beam before it reaches the workpiece.
Jacek Hoffman +2 more
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Laser beam welding with a hybrid laser system
ICALEO 2000: Proceedings of the Laser Materials Processing Conference, 2000Diode lasers are a new high-power beam source for material processing. In comparison to conventional beam sources like CO2 – or Nd:YAG – lasers they have the advantages of small size, low maintenance costs and considerably higher efficiency. Currently one advantage of Nd:YAG – lasers is better beam quality allowing higher focus intensity.
G. Reinhart, J. Härtl, C. Lehner
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Welding with a defocused laser beam
Welding International, 2016The results of experiments carried out to investigate the welding of austenitic stainless steels using a defocused laser beam are presented.
S. V. Kuryntsev +2 more
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Laser beam welding with filler metal
Steel Research, 1999Laser beam welding generally does without the use of filler metal, in contrast to conventional welding processes. The use of filler metal in laser beam welding or in the combined GMA (gas-metal-arc)-laser beam - hybrid welding process widens the field of application for laser beam welding.
Ulrich Dilthey +2 more
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Process control during laser beam welding
ICALEO '91: Proceedings of the Laser Materials Processing Symposium, 1991It will be shown that there is a correlation between the quality of the weld seam and the degree of full penetration. Two methods of monitoring the degree of full penetration have been developed. One method is to detect the emission of the plasma below the workpiece.
D. Maischner +4 more
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Laser beam welding of dissimilar materials
ICALEO 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2009In modern industrial fields, there is a tendency that more and more components or structures are compositely made of dissimilar materials, which offers challenges to the joining technology. In this paper, a review of laser beam welding of some dissimilar materials is presented based on our research. The dissimilar material combinations include W-Cu PMM/
Rongshi Xiao, Peng Dong, Kai Chen
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Haz hardness in laser beam welds
ICALEO '99: Proceedings of the Laser Materials Processing Conference, 1999The thermal profiles that result from a numerical model of laser beam welding are used to calculate the hardness in the heat-affected zone of two 10-mm-thick BS4360 50D steel welds. The numerical model assumes a cylindrical keyhole with the same radius as that of the incident laser beam.
E. A. Metzbower +2 more
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Failure analysis for laser beam welding
ICALEO '97: Proceedings of the Laser Materials Processing Conference, 1997Laser beam welding is a complex manufacturing procedure which is influenced by a multitude of parameters. Interrelationships withdraw from a deep understanding of the physical processes, since cause-and-effect relations of parameters are not clearly determined yet.
S. Kaierle +4 more
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