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Portail > Offres > Offre UMR7198-MARTAI-040 - Étude de la recristallisation d'aciers austénitiques lors de traitement thermo-mécaniques (H/F)

Study of austenitic steels recrystallisation during thermo-mechanical treatment (H/F)

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

Date Limite Candidature : jeudi 24 juin 2021

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General information

Reference : UMR7198-MARTAI-040
Workplace : NANCY
Date of publication : Thursday, June 3, 2021
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 September 2021
Proportion of work : Full time
Remuneration : 2675.27€ gross salary per month
Desired level of education : 5-year university degree
Experience required : 1 to 4 years

Missions

In the frame of the project, research team “Microstructure and Stresses” of IJL (Institut Jean Lamour) contributes to the characterization of the thermo-mechanical behavior of the steel samples and microstructure characterization to understand the phenomena and conditions associated to the recrystallization of steels. The objectives are to define the relation between thermal state, mechanical state and microstructure to avoid the abnormal grain growth due to the recrystallization occuring during real thermo-mechanical forming of the industrial pieces during forging.

Activities

- Design the experimental plans for the determination of the thermo-mechanical behavior according to the real thermo-mechanical conditions and results of numerical simulations performed by FRAMATOME.
- Carry out thermo-mechanical tests on laboratory devices (INSTRON traction machine equipped with an AET lamp furnace).
- analyze the experimental results and optimize the tests in regard of the visco-plastic behavior of the austenitic steels.
- Participate in the detailed characterization of the microstructures studied before and after deformation by SEM / EBSD.
- Analyze the results of the thermo-mechanical tests and the observation of the microstructures in relation to the digital simulation carried out by the other teams of the project.
- Contribute to the dissemination of results (regular meeting, publications, conferences)

Skills

The French Fab Metallurgy project focuses on manufacturing processes for large forgings. It aims to better understand and reduce the heterogeneity of the microstructure of steel.
Experiences in experimental thermo-mechanical behavior and SEM is highly desirable.

Work Context

The Jean Lamour Institute (IJL) is a fundamental and applied research laboratory in the science and engineering of materials and processes, IJL is a multi-thematic laboratory, it covers: materials, metallurgy, plasmas, surfaces, nanomaterials and electronics. The IJL is a joint research unit (UMR 7198) of the CNRS and the University of Lorraine. It is attached to the CNRS Institute of Chemistry. Created in 2009, it now has 550 people (37 researchers, 134 teacher-researchers, 98 engineers, technicians and administrators, 150 doctoral students, 35 post-docs, 46 visitors, more than 100 interns), located on 3 sites in Nancy, Metz and Epinal.
The Institute's “Microstructure and Stresses” research team, based in Nancy, has extensive experience in characterizing phase transformations of metal alloys and relationships with stresses during thermal, mechanical or thermomechanical treatments. This is accompanied by fine characterization by microscopy (SEM, TEM) and in the modeling of the associated mechanisms to explain and estimate the link between the microstructure and the properties of metallic alloys.

Constraints and risks

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Additional Information

Applicants must have a PhD's degree in the field of materials or metallurgy.

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