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Article Dans Une Revue Comptes Rendus. Physique Année : 2010

Mesoscopic modelling of precipitation: A tool for extracting physical parameters of phase transformations in metallic alloys

Michel Perez

Résumé

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.

Domaines

Matériaux

Dates et versions

hal-00542906 , version 1 (03-12-2010)

Identifiants

Citer

A. Deschamps, Michel Perez. Mesoscopic modelling of precipitation: A tool for extracting physical parameters of phase transformations in metallic alloys. Comptes Rendus. Physique, 2010, 11 (34), pp.236-244. ⟨10.1016/j.crhy.2010.07.005⟩. ⟨hal-00542906⟩
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