PhD opportunities

New 3D Finite-Element level-Set Framework for the modeling of Solid-Solid phase transformations and grain Interfaces for Large-Scale Polycrystals.

Thesis proposal

Area of expertiseComputational mechanics and Materials
Doctoral SchoolSFA - Sciences Fondamentales et Appliques
SupervisorM. Marc BERNACKI
Research unitCentre for material forming
Starting dateOctober 1st 2020
KeywordsFE Method, HPC, C++, Metallurgy, Solid-solid phase transformations, Grain interfaces
AbstractIn the emerging context of digital metallurgy, the DIGIMU Chair and consortium have two main objectives. The first one is to develop an efficient multiscale numerical framework specifically designed to take such problems. The second one is to bring the corresponding numerical methods to an industrial level of maturity, by decreasing significantly their computational cost and by validating them against the industrial expertise in the DIGIMU consortium

In order to accurately describe the 3D evolution of polycrystals (recrystallization, phase transformations), full-field methods such as the phase-field (PF) or the level-set (LS) methods have to be employed. In this context, a new FE numerical framework to model grain growth (GG) and recrystallization (ReX) based on a LS description of the interfaces and meshing/remeshing capabilities has been recently developeda. Interestingly, if the LS approach was extended to other self-diffusion mechanisms such as spheroidization in titanium alloys or sintering in powder metallurgy, solid-solid phase transformations (SSPT) was only newly addressedb despite the obvious interest to couple phases and grains evolutions in the same LS numerical framework. In the proposed PhD project, the existing LS framework will be extended in order to model SSPT. The new proposed formalism will be investigated in context of austenite-ferrite transformations. The proposed numerical framework will be compared to pre-existing PF strategy dedicated to this topic.

Finally, the resulting developments will be prepared for integra-tion in the DIGIMU software package.

an austenite-to-ferrite transformation
ProfileDegree: MSc or MTech in Applied Mathematics, Metallurgy or Materials Science, with excellent academic record
Skills: Finite Element Method, Metallurgy, proficiency in English, ability to work within a multi-disciplinary team.
FundingContrat de recherche
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