+ 2019 DISCO – Dislocation Imaging in Scanning electron microsCOpy

Project promoter

Sophie CAZOTTES

sophie.cazottes@nullinsa-lyon.fr

Member laboratorie(s)

Area(s) of search

OBJECTIVE

Predicting the service life of mechanical parts is a fundamental industrial challenge. In order to improve the ability to predict component life, it is necessary to identify and model the influence of manufacturing processes on the microstructure and then on mechanical properties. Such approaches are now being applied industrially, for example, for materials used in the aeronautics and nuclear industries. The methodology developed makes it possible to link microstructural parameters such as grain size, dislocation density, presence of precipitates, to the operating properties of the material. Yet, it has been shown that dislocation density is a parameter that influences mechanical properties in the first order. It is therefore essential to characterize it precisely. However, to date, the determination of dislocation density is complex and time-consuming; moreover, measurement uncertainties remain high, regardless of the characterization method used.
Logo DISCO

DISCO's objective is to develop an automated method for measuring the nature and density of crystallographic defects of polycrystals, and in particular Inconel, using a Scanning Electron Microscope. Thanks to easier and faster observations than existing methods (e. g. Transmission Electron Microscopy) it will be possible to analyze larger volumes and collect more data. The development of this method will thus make it possible to generate more representative data for microstructural and mechanical modelling. Such a challenge is of great interest for industrial applications, and also for researchers who do not have an easy access to TEM microscopes.

Obtaining more representative data will improve the description of microstructures, necessary for microstructure - mechanical properties related models.

moteur avion_DISCO

An engineering adapted to the servicesof the stakes in our partners

CCI LYON, VIBRATECH, THALES, AREVA, VOLVO, RENAULT, MICHELIN, ANNEALSYS, HUTCHINSON, EDF R&D ENERBAT, riber, SKF, EDF, PSA PEUGEOT CITROEN, SAFRAN, CARA, ST MICROELECTRONICS, SEB, Fraunhofer-Gesellschaft, ...