Vapor–plasma plume investigation during high-power fiber laser welding
| Autor: | V N Petrovskiy, Michael Rethmeier, Igor B. Gornushkin, P.Yu. Shcheglov, Andrey Gumenyuk |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
business.industry Attenuation Mie scattering Shielding gas Physics::Optics Laser beam welding Welding Molar absorptivity Condensed Matter Physics Industrial and Manufacturing Engineering Atomic and Molecular Physics and Optics Physics::Geophysics Plume law.invention Optics law Fiber laser business Instrumentation |
| Zdroj: | Laser Physics. 23:016001 |
| ISSN: | 1555-6611 1054-660X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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