Vapor-plasma plume investigation during high-power fiber laser welding . Laser Physics Volume 23, Issue 1, January 2013, Article number 016001

14 сентября 2018
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Вид публикации Статья
Контактные данные автора публикации Shcheglov, P.Yu.abc , Gumenyuk, A.V.a, Gornushkin, I.B.a, Rethmeier, M.a, Petrovskiy, V.N.b a BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, Berlin, 12205, Germany b National Research Nuclear Univ
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Аннотация

This work is devoted to the investigation of the laser-matter interaction during up to 20 kW ytterbium fiber laser welding of thick mild steel plates. The plume attenuation of a probe 1.3 μm wavelength diode laser beam as well as of continuous radiation in the 250-600 nm wavelength range was measured during welding with and without Ar shielding gas supply. The measured results allow the calculation of the average size and concentration of fine condensed metal particles in different plume areas using the multi-wavelength method and the Mie scattering theory. The plume temperature, which determines the condensation conditions, was measured by means of Fe I atom spectral line emission registration. The spatial distribution of the extinction coefficient in the welding plume was measured and the plume attenuation of the high-power fiber laser beam during the welding process was estimated. © 2013 Astro Ltd.



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Indexed keywords

Continuous radiation; Extinction coefficients; High power fiber lasers; High-power fiber laser welding; Laser-matter interactions; Mie scattering theory; Plume attenuation; Ytterbium fiber laser
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