Offers “CEA”

Expires soon CEA

Post-doctorat : Numerical Simulation of Additive Manufacturing H/F (Thermohydraulique et mécanique des fluides)

  • Internship
  • Route du Cyclotron, 91400 Saclay, France, France
  • Energy / Materials / Mechanics

Job description

Domaine : Thermohydraulique et mécanique des fluides

Contrat : Post-doctorat

Description du poste :

Melt pool modelling in Additive Manufacturing by the Selective Laser Melting process
In recent years, additive manufacturing (AM), also referred to as 3D printing, has met a growing interest in various industrial sectors. Indeed, it offers major advantages compared to conventional forming techniques such as : fast prototyping, feasibility of geometrically complex parts...  However, precise control of the process is necessary in order to avoid specific defects in the manu- factured part such as spurious nucleation, cracks, poor surface roughness. In this context, it is well known that heat and mass transfer phenomena in the molten metal play a fundamental role.

In this project, we will work with an existing state of the art weld pool multiphysics numerical model, implemented in the CasteM Finite Element toolbox, which has been validated in the case of the TIG (Tungsten Inert Gas) welding process. We will adapt it to deal with the case of additive manufacturing which involves basically the same physical phenomena as in welding but with different process parameters : higher energy density, faster scanning speed, porosity... These physical parameter changes may in turn entail the use of more advanced numerical methods such as 3D adaptive meshing that we intend to explore. Furthermore, in order to ensure the soundness of the numerical model, comparisons will be made with already available Selective Laser Melting experiments previously carried out at CEA labs on two different materials : an austenitic stainless steel and an aluminium alloy.

Qualifications : Applicants must have an earned Ph.D. degree and strong background in multi- physics, in particular fluid mechanics, numerical simulations.


Bac+8
Doctorat
Simulation numérique multiphysique, mécanique des fluides


Lieu : Route du Cyclotron, 91400 Saclay, France

Langue / Niveau :

Anglais : Courant

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