Missions

This project aims to characterize the elastic energy stored in deformed metals and to contribute to a better understanding of the recrystallization mechanisms, which strongly depend on this energy contribution. This characterization will be carried out using various synchrotron diffraction techniques, including scanning-3DXRD [1], DCT [2], and LPA [3].

Activités

The recruited candidate will actively participate in the preparation of in situ (4D) deformation and recrystallization experiments on the ID11 beamline at the ESRF. The analysis and interpretation of the acquired data will require solid proficiency with the various code bases developed on the beamline. The candidate will be trained in the use of these tools and will be expected to introduce their own modifications in order to adapt and optimize the analysis for the study at hand.
Other tasks include:
* Optimizing the experimental setup (4D observations at 900 K)
* Developing automated workflows for data acquisition and analysis
* Programming in Python and Matlab
* Analyzing results and discussing them with the other project partners
* Writing scientific articles
* Presenting results at conferences or seminars
References:
(1) Henningsson, A. et al. Microstructure and stress mapping in 3D at industrially relevant degrees of plastic deformation. Sci. Reports 14, 1–9 (2024).
(2) Reischig, P. & Ludwig, W. Three-dimensional reconstruction of intragranular strain and orientation in poly-crystals by near-field X-ray diffraction. Curr. Opin. Solid State Mater. Sci. 24, (2020).
(3) Borbély, A., Aoufi, A. & Becht, D. X-ray methods for strain energy evaluation of dislocated crystals. J. Appl. Cryst. 56, 254 (2023).

Compétences

The required degree is a PhD in mechanics, physics, materials science, or a related discipline. The recruited candidate should have the following skills:
* Knowledge of X-ray diffraction and/or image processing
* Strong proficiency in programming with Python and Matlab
* Good command of English
Knowledge of solid mechanics would be an asset, but is not essential.

Contexte de travail

The recruited person will be part of the ANR RAISE project (Recrystallization modelling of metallic Alloys with Improved Stored Energy description), a collaboration between the Georges Friedel Laboratory (LGF, Saint-Étienne), the Centre for Material Forming (CEMEF, Sophia Antipolis), and the Laboratory of Materials Science and Engineering (MATEIS, Lyon). The latter specializes in studying the relationships between materials, processes, and properties. Non-destructive characterization using 3D imaging and diffraction techniques is one of MATEIS's key activities, carried out in close collaboration with the ID11 beamline (materials science) at the Grenoble synchrotron. You will join the group responsible for developing diffraction analysis algorithms at the Grenoble synchrotron.