Metallurgy, microStructure, Rheology – MSR_old

Main objectives

MSR team works on microstructure evolutions induced by thermomechanical processing of metallic materials in the solid state. The research mainly focusses on the :

• description of active physical mechanisms and their kinetics as a function of thermomechanical parameters at the mesoscopic level,
• formulation of physical models describing plastic deformation, recrystallization, grain growth, phase transformations and their couplings,
• implementation of these models in predictive tools for the simulation of microstructural evolutions. This domain implies the development of new numerical methods (HPC in computational metallurgy and mechanics, meshing/remeshing tools, front-tracking and front-capturing description of polycrystalline materials) for high-fidelity simulations but also the development of multiscale modeling strategies and the development of surrogate models through machine learning strategies (e.g. in RealIMotion ANR industrial chair).

Originality of the developed approach lies in the combination of skills and complementary tools: experimental physical metallurgy, mechanical metallurgy, modeling and numerical simulation to address/handle cases, which are complex in nature, close to industrial operations. These works are realized through close collaboration between experimental and numerical analyses.
The MSR team also manages and develops experimental methodologies: thermomechanical tests and heat treatment of metallic materials, metallography and electron microscopy.

Research areas

• Development of experimental tools and methods for quantitative microstructure analysis
• Identification of metallurgical mechanisms and their kinetics
• Mean field modeling and simulation
• Full field modeling and simulation
• Development of numerical methods
• Development of numerical methods
• Multiscale modelling and low-oder surrogate models development thanks to ML strategies
• Development of libraries and calculation codes: cimlib, DIGIMU, Fitz, MPCP, ToRealMotion (TRM), MDivide, DYNAMIX

Current Projects

Equipments

• Dual beam microscope equipped with EDS and EBSD analysis systems for the analysis of microstructures in three dimensions. This microscope is also equipped with a heat treatment chamber with controlled atmosphere.
• High spatial resolution scanning electron microscope (FEG) equipped with combined EDS/EBSD analysis.
• Thermal and thermomechanical treatments up to 1200°C with possibility of water quenching.