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Portail > Offres > Offre UMR6634-CHRVUR-032 - Chercheur/euse - Etude par sonde atomique du vieillissement sous irradiation neutronique d'aciers de cuve de réacteurs à eau pressurisée (H/F)

Researcher - Study of microstructural evolution of neutron irradiated reactor pressure vessel steels by atom probe tomography (M/F)

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : mardi 24 août 2021

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General information

Reference : UMR6634-CHRVUR-032
Workplace : ST ETIENNE DU ROUVRAY CEDE
Date of publication : Tuesday, July 13, 2021
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 15 September 2021
Proportion of work : Full time
Remuneration : between EUR 2648 and 3768 gross monthly salary according to experience
Desired level of education : PhD
Experience required : 1 to 4 years

Missions

Pressurized water reactor vessel steels are made of low alloy bainitic steels. During the operation of the reactor, this steel is irradiated with neutrons, which causes an evolution of its microstructure (in particular, the formation of a high density of nanometric solutes clusters) causing a degradation of its mechanical properties (hardening and embrittlement). One of the objectives of the European STRUMAT program is to evaluate the influence of the nominal composition of steels on the evolution of microstructures under irradiation. For this, different neutron irradiated steels will be analyzed by Atom Probe Tomography at GPM. The results will be compared with those obtained by the project partners using complementary techniques (electron microscopy, small-angle neutron scattering, mechanical tests). The successful candidate will conduct atom probe experiments (sample preparation, analysis and data processing), present the results during European program progress meetings and contribute to the drafting of deliverables.

Activities

- Bibliography on irradiated reactor pressure vessel steels
- Sample preparation (mechanical and electrochemical polishing, focused ion beam machining)
- Characterization of microstructures (Atom probe tomography)
- data analysis and interpretation
- Participation to progress meetings
- Contribution to the drafting of the deliverables
- Writing scientific articles

Skills

- Strong knowledge in physical metallurgy (diffusion, phase transformation)
- Complementary knowledge on aging under irradiation of metal alloys is an additional asset
- Technical skills required in microscopy (SEM / FIB or APT)
- Team work

Work Context

The Material Physics Group (GPM, UMR 6634) is a laboratory from the University of Rouen Normandie (URN), the National Center for Scientific Research (CNRS) and INSA Rouen Normandie. It is located on the Sciences and Engineering Rouen Normandie Campus in Saint-Etienne du Rouvray. The GPM is structured into 5 departments:
- Scientific Instrumentation,
- Metallurgy, Microstructure, Mechanics
- Functional materials and nanostructures
- Disordered systems and polymers
- Thematic openings and Innovations
It brings together 160 staff including 60 Associate professors, professors and Researchers, 30 Technical and Administrative staff and 70 PhD students, postdocs and internship students.
The recruited researcher will be attached to the "Metallurgy, Microstructure, Mechanics" department which includes 4 thematic teams:
- Nuclear materials
- Phase transformations Microstructures
- Multi-scale modeling of phase transformations
- Mechanics of materials
He will work in the "Nuclear Materials" team. This team is working on understanding the aging mechanisms (thermal or irradiation aging) of materials used in current reactors (generation II), on the development of new materials for next reactor generations (Generation IV, fusion) and on the relationships between microstructures and mechanical properties. It now brings together 3 Associate professors / professors, 5 PhD students and is supported by 8 research engineers, study engineers and technicians.

Constraints and risks

- Work in controlled area (Radioprotection)
- Chemical risk (sample electroplolishing)

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