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Physical mechanisms controlling keyhole and melt pool dynamics during laser welding

Chapitre d'ouvrage scientifique
Auteur
FABBRO, Remy
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/18685
DOI
10.1533/9781845699819.3.211
Date
2010

Résumé

The aim of this chapter is to review our main recent understanding of physical mechanisms occurring during keyhole laser welding. The focus is on the analysis of melt pool dynamics showing that it is the interaction of the vapour plume emitted from the keyhole front with the melt pool that plays a dominant role in melt pool dynamics. Different specific regimes concerning the behaviour of the melt pool for a large range of welding speeds can be observed, and these regimes are precisely defined by the inclination of the keyhole front. a model taking into account these physical processes is proposed and allows us to describe the keyhole parameters and to understand these different observed results.

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Nom:
PIMM_ALMP_2010_FABBRO.pdf
Taille:
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Format:
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Description:
Chapitres d'ouvrages scientifiques
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  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

Documents liés

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  • Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime 
    Article dans une revue avec comité de lecture
    BERTHE, Laurent; FABBRO, Rémy; MULLER, Maryse; ccSCHNEIDER, Matthieu (IOP Publishing, 2008)
    Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets. Characteristic laser intensities in the range of 10 MW cm−2 are typically employed for ...
  • A fast method for morphological analysis of laser drilling holes 
    Article dans une revue avec comité de lecture
    BERTHE, Laurent; MULLER, Maryse; FABBRO, Rémy; ccSCHNEIDER, Matthieu (Laser Institute of America, 2010)
    This paper presents an original method for analyzing laser drilled holes. The so-called Direct Observation of Drilled hOle (DODO) method is introduced and its applications. The hole characterization that’s been made is ...
  • Gas investigation for laser drilling 
    Article dans une revue avec comité de lecture
    BERTHE, Laurent; FABBRO, Rémy; MULLER, Maryse; NIVARD, Mariette; ccSCHNEIDER, Matthieu (Laser Institute of America, 2007)
    This article deals with the gas effect on percussion laser drilling in ms pulse duration range. On the one hand, the flow of assistance gas jet is investigated with and without a target using a strioscopy setup and Pitot’s ...
  • Experimental investigation of hydrodynamics of melt layer during laser cutting of steel 
    Article dans une revue avec comité de lecture
    HIRANO, Koji; FABBRO, Rémy (IOP Publishing, 2011)
    In laser cutting process, understanding of hydrodynamics of melt layer is significant, because it is an important factor which controls the final quality. In this work, we observed hydrodynamics of melt layer on kerf front ...
  • 3D heat transfer model of hybrid laser Nd : Yag-MAG welding of a S355 steel and experimental validation 
    Article dans une revue avec comité de lecture
    LE GUEN, Emilie; CARIN, Muriel; FABBRO, Rémy; COSTE, Frédéric; LE MASSON, Philippe (Elsevier, 2011)
    A three-dimensional heat transfer model was developed to predict the temperature fields, the weld geometry and the shape of the solidified weld reinforcement surface during hybrid laser-MAG arc welding of fillet joints. ...

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