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Development of a thermomechanical model for prediction of residual stress during laser powder-bed fusion: evaluation of inherent strain approach

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.23967/wccm-eccomas.2020.120
AuteurRechercher : 1; Rechercher : 1; Rechercher : 1; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Automobile et les transports de surface
FormatTexte, Article
Conférence14th World Congress in Computational Mechanics (WCCM) ECCOMAS Congress 2020, Virtual Congress: 11 – 15 January 2021
Sujetlaser powder-bed fusion (LPBF); additive manufacturing; modelling; temperature gradient; sesidual stress and distortion
Résumé
The build-up of residual stresses in a part during laser powder-bed fusion (LPBF) provides a significant limitation to the adoption of this process. These residual stresses may cause a part to fail during a build or fall outside the specified tolerances after fabrication. Defectfree production of metallic parts using LPBF requires process optimization, as a crucial step, for effective usage of the process. Development of a numerical model to accurately predict the induced residual stresses and distortion during the LPBF process is of great interest as it allows to effectively investigate the influence of processing parameters on the quality of the parts. In this work, we developed a novel high-fidelity finite element (FE) model based on the inherent strain (local-global) approach to simulate the build process and calculate the residual stress and distortion for Hastelloy X specimens built with a continuous scan strategy. Conclusions from the thermomechanical simulations showed good agreement with X-ray diffraction measurements and 3D scanning data used to determine the residual stresses and distortions in the parts.
Date de publication
Maison d’éditionCIMNE
Dans
  • 14th WCCM-ECCOMAS Congress (2021).
Série
  • Manufacturing and Materials Processing 1000.
Langueanglais
Publications évaluées par des pairsOui
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Identificateur de l’enregistrement37db0684-f90f-472e-8a89-dbe5378d1844
Enregistrement créé2021-10-04
Enregistrement modifié2021-10-04
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