Missions

The NOTIFICATION project aims at developing an inverse analysis methodology dedicated to the identification of the coefficients driving the interaction between dislocations on different slip systems. It will be based on micromechanical and microstructural data collected from nanoindentation and EBSD characterization methods. This position follows on from a first post-doc which demonstrated the relevance of disorientation fields for an inverse analysis and tested an initial sample preparation protocol. In this context, the candidate will be required to finalize the measurement protocols for obtaining these observables, and to apply them to different materials, ranging from nickel/copper single crystals to polycrystals. He/she will interact with a post-doctoral student, who will be in charge of carrying out reverse identifications based on the observables measured.

Activités

Finalization of sample preparation protocols (polishing, FIB).
Carrying out ex-situ and in-situ nanoindentation tests in a scanning electron microscope and finite element numerical simulations of these tests.
Carrying out standard EBSD and High Resolution EBSD to measure misorientations, dislocation densities on indent cross sections.
Reconstruction of 3D disorientation fields.
Interaction with another post-doc on the digital part of the project
Inverse identification of work hardening parameters and coefficients of the interaction matrix between sliding systems using optimization techniques.

Compétences

Solid experience of preparation of samples using FIB and laser machining
Experience in nanomechanical testing
Skills in physical metallurgy and material characterization methods
Finite Element Modeling skills would be appreciated but could be acquired if necessary
Ability to integrate into a team and interact.
Ability to communicate results in international conferences

Contexte de travail

The successful candidate will join the LGF of the Ecole des Mines (Saint-Etienne, France). The LGF laboratory gathers a hundred permanent researchers, post-docs and doctoral students in the fields of materials, mechanics and processes. The research activity will be integrated into the "Physics and Mechanics of Materials" (PMM) group, whose expertise is recognized in micromechanical testing and microstructural characterization.
This position is funded by the ANR project entitled NOTIFICATION, bringing together the LGF of Mines Saint-Etienne and the FEMTO-ST Laboratory of the UFC (project leader). The successful candidate will work closely with the members of this consortium.