  In this work, a multiscale approach based on phase field was developed to
simulate the microstructure's evolution under irradiation in binary systems,
from atomic to microstructural scale. For that purpose, an efficient numerical
scheme was developed. In the case of AgCu alloy under Krypton ions irradiation,
phenomenological parameters were computed using atomistic methods, as a
function of the temperature and the irradiation flux. As a result, we predicted
the influence of the irradiation flux and the temperature on the formation of
patterned microstructures. In the case of AgCu, our model was qualitatively and
quantitatively validated by a diffraction experimental study.
