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Metallurgy, Structure, Rheology team

MSR team

 

Responsible :

Nathalie Bozzolo

 

Researchers :

Marc Bernacki, Charbel Moussa

 

Engineers & technicians :

Cyrille Collin, Gilbert Fiorucci, Suzanne Jacomet, Inès Salhi

 

Research domains :

  • Microstructural evolutions of metallic alloys during thermo-mechanical forming

  • Quantitative analysis of microstructures

  • Recrystallization mechanisms

  • Multi-scale modelisation and simulation

homepage MSR CEMEF team

MSR team main objectives :

The MSR group has been striving to establish links between the thermo-mechanics of metal forging, the underlying microstructural evolutions in components being forged and their behavioral laws during and after forming since its creation in the 1980’s.


In 2008, the team focused its efforts on describing recrystallization and grain growth phenomena, processes that influence the final microstructures and properties of forged metallic alloys greatly.


The uniqueness of the team stems from the diversity of the skills and methods it employs: from experimental physical metallurgy, to modelling and numerical simulation passing through mechanical metallurgy, the group exercises all of the above disciplines in order to treat complex industrial problems. The constant communication between these different visions works to create a real synergy in the research performed.


The team also develops and manages experimental setups ranging from thermomechanical solicitations and annealing of metallic alloys to metallography and electron microscopy. At the laboratory scale, three full time MSR technicians manage this activity.

 

 

Examples of projects :

  • Industrial chair ANR OPALE : (2015-2020 ; Chairwoman : Nathalie Bozzolo, Co-chair : P. Villechaise Pprime Institute) : Optimization of the properties of polycrystalline nickel based superalloys through microstructural control of forging operations. Pprime Institute collaboration for the property-microstructure relationship aspect.

  • Industrial chair ANR DIGIMU :  (2016-2020; Chairman : Marc Bernacki, Co-chair: Nathalie Bozzolo): development of industrially viable software (DIGIMU) for full field simulation of recrystallization phenomena.

  • ANR-DFG AHEAD project  : (2017-2020): Analysis of the stability of high entropy alloys through thin film dewetting. Collaborators: CINaM Marseille, MPIE Düsseldorf and Univ. Bochum. The microstructural characterization of the films as well as the analysis of their evolution through annealing is the role of the MSR team.

  • MATMAX project "Microstructure of Annealed Tantalum - Modeling and Analysis of reCRISTallization phenomena" : Collaboration with the CEA since 2009. Analysis of the kinetics and mechanisms of restauration and static recrystallization of pure Tantalum after cold forming. Mean field modelling for the prediction of resulting microstructures and the optimization of industrial thermal treatment protocols.

 

 

Equipments and softwares of MSR team :

  • High resolution scanning electron microscope (SEM-FEG) equipped with coupled EDS and EBSD detectors.

  • In-situ high temperature heating stage for scanning electron microscopy, developed by MSR in collaboration with the MEA team

  • Hot torsion and compression, up to 1200°C.

  • Thermal treatment under vacuum, up to 1400°C with possible water quenching

  • DIGIMU software for full-field simulation of plastic deformation, recrystallization, precipitation and grain growth.

  • StatiX and DynamiX software packages for mean-field simulation of plastic deformation, recrystallization, precipitation and grain growth coupled with thermos-mechanical calculations (Forge or other FE software).

Applications :

Cold metal forming ; Hot metal forming ; Annealing processes ;

 

Aeronautical alloy forging (Nickel superalloys, titanium alloys)

 

Research areas :

>> click on the topic to obtain more details

 

Development of experimental tools and methods for quantitative analysis.


Identification of metallurgical mechanisms and kinetics.


Mean field modelling and simulation.


Full field modelling and simulation.


Industrial chair ANR – Safran OPALE


Industrial chair ANR DIGIMU

 

Key-words :

Mechanical and numeric physical metallurgy

 

Large strains

 

Recrystallization, Grain Growth, Precipitation

 

Experimental analysis, Multi-scale simulations

 

Superalloys, Titanium alloys

 

Academic relations :

  • Carnegie Mellon University, Pittsburgh, USA : Pr A.D. Rollett, Pr. G. S. Rohrer

  • CINaM, Marseille : D. Chatain (Invited researcher of MSR team)

  • Max Plank Institute Düsseldorf, Allemagne : Pr. G. Dehm and Pr. C. Scheu

  • CONICET, Rosario, Argentine : Pr J. Signorelli

  • EPFL, Neuchatel, Suisse : Pr R.E. Logé

  • Instut Pprime, Poitiers : P. Villechaise, et J. Cormier

 

Industrial relations :

Safran, Aubert&Duval, CEA, ArcelorMittal, Areva, Timet, LISI Aerospace

Key facts of the MSR team :

Two industrial ANR chairs in progress.

All fields combined, only about twenty industrial ANR chairs have been financed by the French National Research Agency (ANR) since the creation of the program in 2011. Two of the projects are firmly planted in metallurgy and both are harbored by the CEMEF: OPALE and DIGIMU. They were accepted respectively in 2014 and 2016, after submissions to the grant offers, and are spearheaded by the MSR and MSM teams.

 

The OPALE industrial chair’s goal is the microstructural optimization of the properties of polycrystalline nickel based superalloys through forming operations for aeronautical component manufacturing. Nathalie Bozzolo, chairwoman, has partnered with Patrick Villechaise, co-chairman from the P’ Institute, in order to complement the Cemef’s expertise. The Cemef, being concerned with microstructural evolutions during forming, required the intimate knowledge of the microstructure-properties relationship cultivated by the P’ Institute. Safran, industrial partner and co-financer, considers OPALE as one of its top three projects in its Materials and Process department. The working calendar is comprised of nine thesis works and five post-doctoral studies in between 2015 and 2020. The subjects combine experimental methods with numerical simulation and modelling in order to constitute a coherent multidisciplinary mix with multiple opportunities for collaboration in between researchers.

 

The goal of the industrial ANR chair DIGIMU is to develop software capable of simulating microstructural evolutions during metal forming usable in an industrial environment. The undertaking concerns the optimization of numerical techniques developed in over a decade worth of research headed by Marc Bernacki, chairman of the project, and through the development of still more new simulation methodologies. The DIGIMU software is comprised of models for generic physical processes (plastic deformation, recrystallization, grain growth, precipitation, phase transformation) for which the application specific parameters can be determined by/for each industrial partner. The chair contains an experimental part, headed by the co-chairwoman Nathalie Bozzolo, in order to ensure the coherency of the physical models being developed. The MSR and MSM teams have succeeded in uniting a large number of industrial partners around this project: Areva, Aubert et Duval, Arcelor Mittal, Ascometal, CEA and Safran. The work will be carried out primarily by five PhD students and two post-doctoral students between 2016 and 2020.



For more informations :
http://chaire-opale.cemef.mines-paristech.fr/
http://chaire-digimu.cemef.mines-paristech.fr/

Lastest publications : 2017 (6)

Moussa C., Bernacki M., Besnard R., Bozzolo N., "Statistical analysis of dislocations and dislocation boundaries from EBSD data", Ultramicroscopy, 179 (2017) p.63-72


Richeton T., LE L.T., Chauve T., Bernacki M., Berbenni S., Montagnat M., "Modeling the transport of geometrically necessary dislocations on slip systems: application to single- and multi-crystals of ice.", Modelling and Simulation in Materials Science and Engineering, 25 (2017) p.025010


Buljac A., Shakoor M., Neggers J., Bernacki M., Bouchard P.O., Helfen L., Morgeneyer T. F., Hild F., "Numerical validation framework for micromechanical simulations based on synchrotron 3D imaging", Computational Mechanics, 50:3 (2017) p.419-441


Rudiger C., Favaro M., Valero Vidal C., Calvillo L., Bozzolo N., Jacomet S., Hein J., Gregoratti L., Agnoli S., Granozzi G., Kunze-Liebhauser J., "Substrate grain dependence of carburized planar anodic TiO2 on polycrystalline Ti", ACS Omega, 2:2 (2017) p.631-640


Shakoor M., Bouchard P.O., Bernacki M., "An adaptive level-set method with enhanced volume conservation for simulations in multiphase domains", International Journal for Numerical Methods in Engineering, 109:4 (2017) p.555-576


Chbihi A., Bouchard P.O., Bernacki M., "Influence of Lode angle on modelling of void closure in hot metal forming processes", Finite Elements in Analysis and Design, 126 (2017) p.13-25


More publications of  MSR team

 

Internal collaborations of the MSR team:

 Interaction with the MultiScale Modeling (MSM) team of CEMEF

► More about MSM team

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