Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
A Fluid-Dynamic Numerical Model for the Selective Laser Melting of High-Thickness Metallic Layers
Year:2017
Research Areas
  • Mechanical engineering
Information
Abstract
Productivity in the Selective Laser Melting Process (SLM) is directly related with the thickness of the powder bed that is repeatedly applied, at every increment, in the growing of consolidated material in the additive manufacturing process. Although most of the relevant phenomena (limited diffusivity associated to particles contact, phase changes, gradients of surface tension associated with Marangoni convection, or even recoil pressure) are considered in the models with small bed thicknesses (roughly 20 µm ? 40 µm), in the case of larger thicknesses (between 100 µm and 200 µm) these factors strongly influence the size and shape of the fusion bath leading to a non trivial geometry of the final consolidated material. The present work proposes the use of the Arbitrary Lagrangean-Eulerian method (ALE method) to solve the thermal and Navier-Stokes equations in the frame of a free-moving discretization to predict simultaneously the space-time temperature evolution and the associated fusion bath dynamics. It allows for using a continuous domain to represent the powder bed, which, instead of a particle model approach, is advantageously compatible with realistic process parameters, where long paths are covered by the laser. The model was validated with experimental data using Inconel as working material, showing a good degree of agreement.
International
Si
Congress
LiM 2017 ? Lasers in Manufacturing
960
Place
Reviewers
Si
ISBN/ISSN
CDP08UPM
Start Date
26/06/2017
End Date
29/06/2017
From page
1
To page
10
Conference proceedings of the LiM-17
Participants
  • Autor: Francisco Cordovilla Baro (UPM)
  • Autor: Miguel Garzón (PM-TecS.A.S)
  • Autor: Diego Alejandro Muñoz (Optimización Matemática de Procesos ÓPTIMO. Centro de Ciencia Básica. Universidad Ponti¿cia Bolivariana)
  • Autor: Javier Diaz (IKERGUNE)
  • Autor: Angel Garcia Beltran (UPM)
  • Autor: Jose Luis Ocaña Moreno (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Investigación en Ingeniería y Aplicaciones del Láser
  • Centro o Instituto I+D+i: Centro Laser
  • Departamento: Física Aplicada e Ingeniería de Materiales
  • Departamento: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial
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