Classical Nucleation and Growth Theories provide a compelling framework predicting the nucleation and growth of precipitates. When implemented in a class model, such an approach provides the time evolution of the Particle Size Distribution. It is shown in this article that a reversion treatment (instantaneous heating of the microstructure to a temperature high enough to induce some dissolution of the precipitates) can be used to calibrate all physical parameters of the model independently: (i) the solubility limit of alloying element is related to the equilibrium volume fraction; (ii) the interfacial energy is related to the minimum of volume fraction evolution; and (iii) the diffusion constant is related to the kinetics of the precipitate radii evolution.
La Théorie Classique de la Germination/Croissance est un puissant outil pour prédire des cinétiques de précipitation. Implémentée dans un modèle par classes de taille, cette approche permet de prédire l'évolution de la distribution de taille des précipités. Dans cet article, il est montré qu'un traitement de réversion (chauffage à une température qui entraine une dissolution partielle des précipités) peut être utilisé pour déterminer de façon indépendante tous les paramètres physiques du modèle : (i) la limite de solubilité est liée à la fraction volumique précipitée d'équilibre, (ii) l'énergie d'interface est liée au minimum de la fraction volumique précipitée, et (iii) le coefficient de diffusion est lié à la cinétique d'évolution du rayon moyen des précipités.
Mot clés : Précipitation, Théorie Classique de la Germination/Croissance, Modèle par classes de taille
Alexis Deschamps 1; Michel Perez 2
@article{CRPHYS_2010__11_3-4_236_0, author = {Alexis Deschamps and Michel Perez}, title = {Mesoscopic modelling of precipitation: {A} tool for extracting physical parameters of phase transformations in metallic alloys}, journal = {Comptes Rendus. Physique}, pages = {236--244}, publisher = {Elsevier}, volume = {11}, number = {3-4}, year = {2010}, doi = {10.1016/j.crhy.2010.07.005}, language = {en}, }
TY - JOUR AU - Alexis Deschamps AU - Michel Perez TI - Mesoscopic modelling of precipitation: A tool for extracting physical parameters of phase transformations in metallic alloys JO - Comptes Rendus. Physique PY - 2010 SP - 236 EP - 244 VL - 11 IS - 3-4 PB - Elsevier DO - 10.1016/j.crhy.2010.07.005 LA - en ID - CRPHYS_2010__11_3-4_236_0 ER -
%0 Journal Article %A Alexis Deschamps %A Michel Perez %T Mesoscopic modelling of precipitation: A tool for extracting physical parameters of phase transformations in metallic alloys %J Comptes Rendus. Physique %D 2010 %P 236-244 %V 11 %N 3-4 %I Elsevier %R 10.1016/j.crhy.2010.07.005 %G en %F CRPHYS_2010__11_3-4_236_0
Alexis Deschamps; Michel Perez. Mesoscopic modelling of precipitation: A tool for extracting physical parameters of phase transformations in metallic alloys. Comptes Rendus. Physique, Volume 11 (2010) no. 3-4, pp. 236-244. doi : 10.1016/j.crhy.2010.07.005. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2010.07.005/
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