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**Recrystallization study of electrical steel by diffraction contrast tomography**:
- Réf **ABG-126369**
- Stage master 2 / Ingénieur- Durée 6 mois- Salaire net mensuel French SMIC- 21/10/2024- ENS des Mines de Saint-Etienne- Lieu de travail- Saint-Etienne Auvergne-Rhône-Alpes France- Champs scientifiques- Matériaux
- Physique
- Sciences de l’ingénieur
- Mots clés- X-ray diffraction, polycrystal, grain structure, 3D image processing**Établissement recruteur**:
**Site web**:
École Nationale Supérieure des Mines de Saint-Étienne is a graduate engineering school and research institute aka « Grande École d’Ingénieurs » founded in 1816. Our range of career-focused diplomas will open doors to some of the best careers in the field of engineering and enable you to build your own international network.
**Description**:
Nowadays, the demand for electrical energy is constantly increasing. Dealing with this issue, energy grids and transformers are continuously optimized and redesigned. In this context, reducing more and more the energy loss in electricity transmission and distribution systems is a real concern.
Electrical steel plays a key role wherever electrical energy is efficiently generated, converted or used. The best example is transformers. They need grain oriented electrical steel (GOES) to be able to function efficiently, their performance being directly determined by the bulk magnetic domain structure and by the mobility of the domains walls.
The magnetic properties of GOES are strongly dependent on material crystallographic texture. Obtaining such oriented grain structure over macroscopic lengths is a real metallurgical challenge and in practice it is difficult to be optimized by industrial interrupted test measurements. In industrial environments, a few hundred of tests could be usually necessary for technology and product development, which is expensive and time consuming.
Within the frame of this master thesis we propose to use high energy synchrotron radiation for following in situ the crystallographic orientation change during annealing and recrystallization of iron-silicon samples. The in situ approach allows accurate characterization of grain orientation (crystallographic texture) with excellent time and temperature resolution, which could radically reduce technology development cost and time.
Experiments were already done at the European Synchrotron Radiation Facility in Grenoble. The evaluation of diffraction images will be performed with already existing scientific software, but basic knowledge of Python or Matlab will be necessary. This work is a collaboration between MINES Saint-Etienne and thyssenkrupp Electrical Steel UGO.
**Profil**:
Background in Materials Science or physics, as well as programming in Python/Matlab are necessary.
A continuation of this work on a similar topic will be possible within the frame of a PhD starting in October 2025.
**Prise de fonction**:
- 01/04/2025
