Activités de recherche
Dr. Quey’s primary area of research is the mechanics and materials science associated with deformation processes of polycrystalline materials. The general aim of the research is to develop a better understanding of the deformation heterogeneities that arise at the microstructure scale. Such heterogeneities are crucial at different stage of materials’ life : when they arise during the large deformations at the elaboration stage, they drive the mechanical response and softening phenomena (recrystallization nucleation, etc.); in the final material, they drive fatigue or rupture. Dr Quey’s developments involve both experimental and numerical investigations, and the development of new theoretical concepts. Experiments are based on electron diffraction (EBSD) and high‐energy X‑ray diffraction at synchotrons and aims at tracking the evolution of individual grains in the bulk of the material during deformation. Most simulations are carried out in using the finite element method, for which a particular emphasis is drawn on the numerical description of the polycrystals (Neper software package). New concepts are drawn for the analysis of the local microstructural or mechanical states of the material. The end goal of this research is a more fundamental understanding of the relation between the microstructure of a material and the associated mechanical properties. Applications include metal forming, fatigue and rupture.
See neper (http://neper.sourceforge.net).
Diplôme d’ingénieur (Mécanique), INSA de Rouen, 2004
Master recherche (Sciences des matériaux), Ecole des Mines de Saint‐Etienne, 2005
Thèse de doctorat (Sciences des matériaux), Ecole des Mines de Saint‐Etienne, 2009
Chargé de recherche CNRS, Saint‐Etienne, France, 2012‐…
Postdoc au CEA‐LETI, Grenoble, France, 2011
Postdoc à Cornell University, Ithaca (NY), USA, 2010
- R. Quey and L. Renversade. Optimal polyhedral description of 3D polycrystals : method and application to statistical and synchotron X‑ray diffraction data. Comp. Methods Appl. Mech. Eng., 2018.
– M. Kasemer, R. Quey, and P. Dawson. The Influence of Mechanical Constraints Introduced by beta Annealed Microstructures on the Yield Strength and Ductility of Ti‐6Al‐4V. J. Mech. Phys. Solids, 2017.
– B. Mortazavi, R. Quey, H. Ostadhossein, A. Villani, N. Moulin, A.C.T. Van Duin, and T. Rabczuk. Strong thermal transport along polycrystalline transition metal dichalcogenides revealed by multiscale modelling for MoS2. Appl. Mater. Today, 7:67–76, 2017.
– M. Sledzinska, R. Quey, B. Mortazavi, B. Graczykowski, M. Placidi, D. Saleta Reig, D. Navarro Urrios, F. Alzina, L. Colombo, S. Roche, and C.M. Sotomayor Torres. Record Low Thermal Conductivity of Polycrystalline MoS2 films : Tuning the Thermal Conductivity by Grain Orientation. ACS Appl. Mater. Interfaces, 9:37905–37911, 2017.
Prix Jean Mandel en 2015