Duration: 18 months, start: November 2014

The lab

INSA Lyon is an engineering school based in Lyon France, it graduates over 950 engineers each year in 12 fields of specialization. Inside this large institution several research laboratories are present, Mateis laboratory being one of them. MATEIS concerns are the optimization of material properties (mechanical properties, corrosion,…) of structural materials, as well as the development of new materials in order to decrease the weight of different products. Different classes of materials are studied: metallic materials, ceramic materials, polymers and composites, through several aspects; elaboration, microstructural characterization, thermomechanical transformations, and modeling.
Mateis has its own conventional TEM and SEM equipped with EDX and EBSD detectors, and it benefits from the presence of the CLYM (Lyon Microscopy Center www.clym.fr), which is an electron microscopy platform equipped with a FEG 200kV TEM, a Dual Beam FIB-SEM, and a Cs Corrected Environmental 300kV TEM equipped with a GIF (EELS) Filter for EELS and EFTEM characterization. One of the main interests of the lab being the relation of microstructure and properties in metallic materials.

The Project

This 18 months project is part of a ANR (French National Research Agency) project led by Frédéric Danoix (GPM Rouen). It will be performed in the laboratory Mateis INSA Lyon and supervised by Sophie Cazottes and Thierry Epicier.
The main objective of this project is study the phenomenon of low temperature aging of the martensite. The goal is to follow the different mechanisms of phase transformation as well as final phases generated.
The microstructural evolution of Fe-C-X alloys during ageing will be characterized by Transmission Electron Microscopy. The spinodal decomposition will be followed by Electron Diffraction and TEM imaging. Transmission Electron Microscopy will be performed using MATEIS and CLYM equipments.
This will be done in close interaction with the work of Atom Probe Tomography in the Materials Physics Group of Rouen and numerical simulation calculations performed in Rouen and at the IM2NP laboratory in Marseille.

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