Design and experimental characterisation of a novel martensitic Fe-Cr steel
5 to 6 months
MINES St-Etienne,), with a stay (1-2 weeks) at the Jean Lamour Institute (Nancy)
Recently, we designed a new steel with promising properties. This alloy, based on iron and rich in chromium and carbon, containing small additions of several other metallic elements, presents in its cast state a high hardness (greater than 600 HV), probably resulting from its nanostructure (containing ferritic/martensitic and austenitic phases). The objective of the study is to analyse the phase transformations in this material, in order to optimize its heat treatment and evaluate its mechanical properties. The study will also include a comparison of the material with certain grades of commercial steels.
The study program will include:
- Thermodynamic calculations (ThermoCalc software);
- Conventional analyses: thermal treatments, optical microscopy, hardness measurements;
- In-depth structural analyses: SEM + EBSD, MET;
- Analysis of phase transformations by dilatometric methods (in collaboration with IJL, Nancy);
- Mechanical characterization: tensile and impact (Charpy) tests.