Transient dynamics and stability of keyhole at threshold in laser powder bed fusion regime investigated by finite element modeling
| Autor: | Yaasin A. Mayi, Rémy Fabbro, Morgan Dal, Patrice Peyre, Michel Bellet, Clara Moriconi, Charlotte Metton |
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| Přispěvatelé: | Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Centre de Mise en Forme des Matériaux (CEMEF), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Safran Tech, The authors are grateful to Anthony D. Rollett and Tao Sun for helpful discussion on their x-ray experiments. This work has been supported by Safran Additive Manufacturing and Association Nationale de la Recherche et de la Technology (ANRT). |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Matériaux [Sciences de l'ingénieur] Biomedical Engineering 02 engineering and technology 01 natural sciences law.invention [SPI.MAT]Engineering Sciences [physics]/Materials Stress (mechanics) Recoil law 0103 physical sciences Instrumentation 010302 applied physics Fusion laser-matter interaction Marangoni effect Laser beam welding Mechanics 021001 nanoscience & nanotechnology Laser beam trapping Atomic and Molecular Physics and Optics Finite element method Electronic Optical and Magnetic Materials keyhole laser welding 0210 nano-technology keyhole instabilities Keyhole multiple reflections |
| Zdroj: | Journal of Laser Applications Journal of Laser Applications, Laser Institute of America, 2021, 33 (1), pp.1-10. ⟨10.2351/7.0000330⟩ |
| ISSN: | 1042-346X 1938-1387 |
| Popis: | 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 model includes relevant physics to treat the hydrodynamic problems - surface tension, Marangoni stress, and recoil pressure - as well as a self-consistent ray-tracing algorithm to account for the "beam-trapping"effect. Implemented in both static and scanning laser configurations, the model successfully reproduces some key features that most recent x-ray images have exhibited. The dynamics of the liquid/gas interface is analyzed, in line with the distribution of the absorbed intensity as well as with the increase of the keyhole energy coupling. Based on these results, new elements are provided to discuss our current understanding of the keyhole formation and stability at threshold. The authors are grateful to Anthony D. Rollett and Tao Sun for helpful discussion on their x-ray experiments. This work has been supported by Safran Additive Manufacturing and Association Nationale de la Recherche et de la Technology (ANRT). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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