Spectroscopic diagnostics on CW-laser welding plasmas of aluminum alloys

Palanco, S.; Klassen, M.; Skupin, J.; Hansen, K. S.; Schubert, E.; Sepold, G.; Laserna, J.J.

doi:10.1016/s0584-8547(01)00212-9

Cited by 63 publications

(16 citation statements)

References 8 publications

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“…Several papers dealt with the optical signal generated by laser induced plasmas, during laser welding process and a lot of techniques have been used to monitor this radiation [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Optical detection of conduction/keyhole mode transition in laser welding

Sibillano¹,

Ancona²,

Berardi

et al. 2007

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Optical detection of conduction/keyhole mode transition in laser welding

Sibillano¹,

Ancona²,

Berardi

et al. 2007

Journal of Materials Processing Technology

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“…The T e reflects the heat input, while the N e is closely associated with the evaporation and the ionization of the materials. The T e can be deduced by relative intensities of two spectral lines of the same element under same ionization stage if the plasma is in local thermal equilibrium (LTE) [19][20][21][22]. The assumption of LTE is fulfilled when the N e is high enough so that 18 …”

Section: Electron Temperature and Electron Density Of The Plasmamentioning

confidence: 99%

Characteristics of plasma plume in fiber laser welding of aluminum alloy

Gao

Chen

et al. 2015

Applied Surface Science

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“…Through the continuously generated vapour inside the keyhole, an effusion of material develops resulting in a metal vapour plume. Recent measurements of spectral radiation during laser welding with solid-state lasers showed the emergence of characteristic lines emitted by the metal vapour [5][6][7]. These lines are similar to the optical emissions during laser induced breakdown spectroscopy (LIBS).…”

Section: Emission Spectrums In Deep Penetration Weldingmentioning

confidence: 99%

Characteristic line emissions of the metal vapour during laser beam welding

Zaeh

Huber

2011

Prod. Eng. Res. Devel.

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This article provides an insight into the origin of the radiation emissions during laser beam welding of aluminium and steel alloys. It is the fundamental basis for the development of a system monitoring the welding process of challenging alloys with respect to their chemical composition in the melt pool. To reduce welding faults, e.g. cracks, brittle phases or other metallurgical based defects, a high degree of process knowledge is necessary. This manuscript presents novel spectroscopic investigations used to analyse laser beam welding setups to gain a better understanding of the emission formation. Therefore, also the spatial origin of the emitted radiation of the deep penetration welding process was examined. These empirical results are accompanied by theoretical considerations about the excitation degree of different alloying elements. Together they are a progressive step to develop a system to control the chemical composition of the melt pool during the active welding process. Knowing the composition of the melt allows to control e.g. a filler unit to change the melt composition. The empirical results were conducted by processing common alloys of today's manufacturing applications.

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Spectroscopic diagnostics on CW-laser welding plasmas of aluminum alloys

Cited by 63 publications

References 8 publications

Optical detection of conduction/keyhole mode transition in laser welding

Optical detection of conduction/keyhole mode transition in laser welding

Characteristics of plasma plume in fiber laser welding of aluminum alloy

Characteristic line emissions of the metal vapour during laser beam welding

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