Post-doctoral position, 18 month in Marseille, France.
Modeling of phase transformations in 3rd generation duplex steels.
Next European regulations on CO2 emissions for automotive transportation require the development of third-generation steels. The targeted mechanical properties include high strength, good uniform elongation and lower density compared to actual carbon steels.
In this context, ArcelorMittal Research and four academic research laboratories in France launched a 4-year collaborative research project, founded by the French national agency for research (ANR). The objective of the project is to investigate the physical metallurgy of high strength duplex steels based on medium manganese and medium aluminium content.
In this framework, our Institute proposes a 1.5 year post-doctoral position. It is dedicated to the modelling of the kinetics of phase transformations in the duplex steels under development in the project, over a wide range of temperatures. The work program is divided in two parts:
- Prediction of the kinetics of phase transformations occurring during the high temperature heat treatments of the steels, as well as during slow cooling. The velocity of interphase boundary migration controls the diffusive phase transformations in consideration. The DICTRA software is well adapted to providing the fractions and compositions of the phases as functions of time, allowing for heat treatment optimization.
- Spinodal decomposition of the austenite islands into gamma and kappa-Fe3Alx phases at low temperature leads to a significant improvement of the mechanical properties. The objective of this task is to predict the resulting phase distribution as a function of temperature and alloying content. A novel model will be built, based on an atomic-scale mean-field model.
The candidate is expected to have an experience on computer modelling in the field of physical metallurgy.
Contact: Philippe Maugis, email@example.com, tel. +33 4 91 28 83 61.