Authors:
Flore Villaret (EDF-R&D, France),
Yann de Carlan (Université Paris-Saclay, CEA, France),
Damien Fabrègue (Université de Lyon, France),
Jérôme Garnier (Université Paris-Saclay, CEA, France),
Xavier Boulnat (Université de Lyon, France)
Abstract:
The use of different steel powders allows to obtain either multi-material junctions, when they are stacked, or new duplex alloys when they are blended.This study focuses on new materials obtained by Spark Plasma Sintering (SPS) or Hot Isostatic Pressing (HIP) with an austenitic 316L steel and a martensitic Fe-9Cr steel powders. These materials are characterized at different scales: from metallography to electron microscopy with EDX and EBSD, hardness and tensile tests.The mechanical behaviour of materials cannot be described by a simple law of mixtures. To better understand this phenomenon by describing the obtained materials as a composite, Reuss and Voigt models are used and discussed.The microstructural characterizations show that during the consolidation, the diffusion of the chemical species modifies the nature and the amount of phases, which makes it possible to understand why the models do not completely account for the experimental behaviour.
DOI:
https://doi.org/10.59499/WP225371658