Modeling of the molar volume of the solution phases in the Al-Cu-Mg system

The temperature and pressure dependences of molar volume of the solution phases in the Al-Cu-Mg system have been modeled by using the CALPHAD approach. Molar volumes of pure elements were critical assessed according to the experimental data from the literature. Subsequently, volumetric properties of the Al-Cu, Al-Mg and Cu-Mg binary systems were assessed and compared with the corresponding experimental data. The results are compatible with the assessed data.