Skip to Main content Skip to Navigation
Journal articles

Numerical study of the impact of vaporisation on melt pool dynamics in Laser Powder Bed Fusion - Application to IN718 and Ti–6Al–4V

Abstract : A finite element model of Laser Powder Bed Fusion (LPBF) process applied to metallic alloys at a mesoscopic scale is presented. This Level-Set model allows to follow melt pool evolution and track development during building. A volume heat source model is used for laser/powder interaction considering the material absorption coefficients, while a surface heat source is used to consider the high laser energy absorption by dense metal alloys. An energy solver is applied considering convection and conductivity evolution in the system. Shrinkage during consolidation from powder to dense material is modelled by a compressible Newtonian constitutive law. An automatic remeshing strategy is also used to provide a good compromise between accuracy and computing time. Different cases are investigated to demonstrate the influence of the vaporisation phenomena, of material properties and of laser scan strategy on bead morphology.
Document type :
Journal articles
Complete list of metadata

https://hal-mines-paristech.archives-ouvertes.fr/hal-02986933
Contributor : Michel Bellet <>
Submitted on : Tuesday, November 3, 2020 - 1:31:35 PM
Last modification on : Sunday, November 8, 2020 - 3:04:50 AM
Long-term archiving on: : Thursday, February 4, 2021 - 6:32:50 PM

File

Queva-et-al AddManuf2020.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Alexis Queva, Gildas Guillemot, Clara Moriconi, Charlotte Metton, Michel Bellet. Numerical study of the impact of vaporisation on melt pool dynamics in Laser Powder Bed Fusion - Application to IN718 and Ti–6Al–4V. Additive Manufacturing, Elsevier, 2020, 35, ⟨10.1016/j.addma.2020.101249⟩. ⟨hal-02986933⟩

Share

Metrics

Record views

60

Files downloads

188