• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)
  • View Item
  • Home
  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Physical mechanisms of conduction-to-keyhole transition in laser welding and additive manufacturing processes

Article dans une revue avec comité de lecture
Author
MAYI, Yaasin A.
505477 Safran Tech
ccPEYRE, Patrice
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
BELLET, Michel
301492 Mines Paris - PSL (École nationale supérieure des mines de Paris)
1158 Centre de Mise en Forme des Matériaux [CEMEF]
FABBRO, Remy
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
1158 Centre de Mise en Forme des Matériaux [CEMEF]
ccDAL, Morgan
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/23048
DOI
10.1016/j.optlastec.2022.108811
Date
2022-10
Journal
Optics & Laser technology

Abstract

Thermo-hydrodynamic phenomena which take place during laser welding or additive manufacturing processes as laser powder bed fusion, have been investigated for years, but recent advances in X-ray images and in situ analysis have highlighted new findings that are still under debate. Conduction-to-keyhole transition, and more broadly, keyhole dynamics, are typical cases, where complex coupling between hydrodynamic and optical problems are involved. In this paper, a keyhole and melt pool model is developed with the software COMSOL Multiphysics®, where laser energy deposition is computed self-consistently thanks to a ray tracing algorithm. The model successfully reproduces experimental findings published in the literature and helps to analyze accurately the role played by the beam trapping phenomenon during the conduction-to-keyhole transition, in both spot welding (i.e., stationary laser illumination) and welding configurations (i.e., with scanning speed). In particular, it is shown that depending on the welding speed, multiple reflections might be either a stabilizing or a destabilizing factor. Understanding these mechanisms is thus a prerequisite for controlling the stability of the melt pools during the joining or the additive manufacturing processes.

Files in this item

Name:
PIMM_OLT_2022_DAL.pdf
Size:
6.581Mb
Format:
PDF
Description:
Physical mechanisms of conduct ...
Embargoed until:
2023-05-29
View/Open

Collections

  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

Related items

Showing items related by title, author, creator and subject.

  • Laser-induced plume investigated by finite element modelling and scaling of particle entrainment in laser powder bed fusion 
    Article dans une revue avec comité de lecture
    MAYI, Yaasin; PEYRE, Patrice; BELLET, Michel; METTON, Charlotte; MORICONI, Clara; FABBRO, Rémy; ccDAL, Morgan (IOP Publishing, 2019)
    Although metal vaporisation has been observed in several laser processes such as drilling or welding, vapour plume expansion and its induced side effects are not fully understood. Especially, this phenomenon is garnering ...
  • Erratum: “Transient dynamics and stability of keyhole at threshold in laser powder bed fusion regime investigated by finite element modeling” [J. Laser Appl. 33, 012024 (2021)] 
    Article dans une revue avec comité de lecture
    MAYI, Yaasin A.; PEYRE, Patrice; BELLET, Michel; METTON, Charlotte; MORICONI, Clara; FABBRO, Remy; ccDAL, Morgan (Laser Institute of America, 2021)
    Correction
  • Transient dynamics and stability of keyhole at threshold in laser powder bed fusion regime investigated by finite element modeling 
    Article dans une revue avec comité de lecture
    MAYI, Yaasin A.; PEYRE, Patrice; BELLET, Michel; METTON, Charlotte; MORICONI, Clara; FABBRO, Remy; ccDAL, Morgan (Laser Institute of America, 2021)
    A Finite element model is developed with a commercial code to investigate the keyhole dynamics and stability at keyhole threshold, a fusion regime characteristic to laser microwelding or to Laser Powder Bed Fusion. The ...
  • Absorptivity measurements during laser powder bed fusion of pure copper with a 1 kW cw green laser 
    Article dans une revue avec comité de lecture
    ccNORDET, Guillaume; GORNY, Cyril; ccMAYI, Yaasin; ccDALIGAULT, Julien; ccDAL, Morgan; EFFERNELLI, A.; BLANCHET, E.; COSTE, Frédéric; ccPEYRE, Patrice (Elsevier Ltd, 2021-10)
    A 1 kW CW green laser source operating at 515 nm was used to investigate the absorptivity of pure copper powder beds and pure copper substrates. Various interaction regimes were considered, ranging from the solid and/or ...
  • Analysis of laser–melt pool–powder bed interaction during the selective laser melting of a stainless steel 
    Article dans une revue avec comité de lecture
    GUNENTHIRAM, Valérie; PEYRE, Patrice; COSTE, Frédéric; FABBRO, Rémy; ccDAL, Morgan; ccSCHNEIDER, Matthieu (Laser Institute of America, 2017)
    The laser powder bed fusion (LPBF) or powder-bed additive layer manufacturing process is now recognized as a high-potential manufacturing process for complex metallic parts. However, many technical issues are still to ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales