Modeling of GP(I) zone formation during quench in an industrial AA7449 75mm thick plate

Patrick Schloth 1, 2 Alexis Deschamps 3 Charles-André Gandin 4 Jean Marie Drezet 2, *
* Auteur correspondant
1 PSI - Paul Scherrer Institute
2 Computational Materials Laboratory
3 SIMaP - Science et Ingénierie des Matériaux et Procédés
4 CEMEF - Centre de Mise en Forme des Matériaux
Abstract : The GP(I) zone formation during quench is simulated in an industrial Aluminum alloy AA7449 75 mm thick plate by using a multi-class precipitation model. For this purpose, results of in situ SAXS experiments are reported. A methodology is presented that takes advantage of the collected data to derive i - a thermodynamic description for GP(I) zones from reversion heat treatments by using a solubility product and ii - the influence of excess vacancies on diffusion coefficients. This approach allows reproducing reasonably well the GP(I) zone formation measured during rapid cooling. Further, the simulated as-quenched surface yield strength compares well with experimental results reported in the literature.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01410400
Contributeur : Magalie Prudon <>
Soumis le : mardi 6 décembre 2016 - 15:57:15
Dernière modification le : mercredi 20 février 2019 - 12:40:05

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Patrick Schloth, Alexis Deschamps, Charles-André Gandin, Jean Marie Drezet. Modeling of GP(I) zone formation during quench in an industrial AA7449 75mm thick plate. Materials and Design, Elsevier, 2016, 112, pp.46 - 57. ⟨10.1016/j.matdes.2016.09.052⟩. ⟨hal-01410400⟩

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