Schloth, PatrickDeschamps, AlexisGandin, Charles AndréDrezet, Jean-Marie2016-10-192016-10-192016-10-19201610.1016/j.matdes.2016.09.052https://infoscience.epfl.ch/handle/20.500.14299/130583WOS:000387279700006The GP(I) zone formation during quench is simulated in an industrial Aluminumalloy AA7449 75mmthick 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.Al-Zn-Mg(-Cu) alloysQuenchingGP(I) zonesPrecipitation modelingVacanciestext::journal::journal article::research article