Melt Pool and Keyhole Behavior Analysis for Deep Penetration Laser Welding

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Afficher la notice abrégée FABBRO, Rémy
  86289 Procédés et Ingénierie en Mécanique et Matériaux [Paris] [PIMM] 2013-12-09T08:34:54Z 2013-12-09T08:34:54Z 2010 2013-12-06T10:48:09Z
dc.description.abstract One usually defines the main characteristic of the welding performances of a given laser system by its “penetration curve” that corresponds to the welding depth as a function of the welding speed Vw for a given set of operating parameters. Analysis of a penetration curve is interesting and gives very fruitful results. Coupled with high speed video imaging of melt pool surface and ejected plume behaviors, the analysis of this penetration curve on a very large range of welding speeds, typically from 0 to 50 m/min, has allowed us to observe very different and characteristic regimes. These regimes are mainly characterized by the physical processes by which they impede the laser beam penetration inside the material. We show that it is only at rather high welding speeds that these limiting processes are reduced. Consequently the scaling law of welding depth with welding speed is in agreement with adapted modeling of this process. On the other hand, as the welding speed is reduced, different effects depending of the weld pool dynamics and plume interaction, strongly disturb the keyhole stability and are responsible of the deviation of the penetration curve from the previous modeling that agrees with a 1/Vw scaling law. A corresponding criterion for the occurrence of this effect is defined. en_US
dc.language.iso en en_US
dc.publisher IOP en_US
dc.rights Post-print en_US
dc.subject Laser welding en_US
dc.subject Keyhole en_US
dc.subject Melt pool hydrodynamics en_US
dc.subject Humping instability en_US
dc.title Melt Pool and Keyhole Behavior Analysis for Deep Penetration Laser Welding en_US
dc.identifier.doi 10.1088/0022-3727/43/44/445501
dc.typdoc Articles dans des revues avec comité de lecture en_US
dc.localisation Centre de Paris en_US
dc.subject.hal Sciences de l'ingénieur: Mécanique: Mécanique des fluides en_US
ensam.workflow.submissionConsumer newSubmission *
ensam.audience Internationale en_US 445-501 en_US
ensam.journal Journal of Physics D : Applied Physics en_US
ensam.hal.faultCode The argument 'doi' (value = '10.1088/0022-3727/43/44/445501') included in the request is allready on HAL
ensam.volume 43 en_US

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