PRELIMINARY STUDY ON LASER-MATTER INTERACTION IN LASER-ARC HYBRID WELDING

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It is well known that the laser beam can be absorbed and/or scattered during its path from laser head to workpiece surface in laser-arc hybrid welding. It is believed that absorption is generated mainly by inverse Bremsstrahlung in arc plasma of laser-arc hybrid welding, while scattering is governed by Rayleigh scattering in the metal vapour region, formed by laser high-power irradiation on metallic surface. A particle-based numerical simulation technique for these kinds of laser-matter interaction is introduced to predict the redistribution of the incident laser beam energy. The methodology for laser scattering is adopted from the photon mapping technique which is widely used in the rendering process of computer graphics in recent years. The shape of the keyhole in high-power welding is also considered to observe the effect of multiple laser beam reflections in the keyhole.
Publisher
Int Inst Welding
Issue Date
2009
Language
English
Article Type
Article
Keywords

KEYHOLE

Citation

WELDING IN THE WORLD, v.53, no.9-10, pp.R264 - R270

ISSN
0043-2288
URI
http://hdl.handle.net/10203/100244
Appears in Collection
ME-Journal Papers(저널논문)
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