Thermodynamic optimization of the Li-Mg and Al-Li-Mg systems

The thermodynamic reassessment of the Li-Mg system has been performed by considering the latest experimental data. A noticeable improvement for the description of the experimental phase diagram and thermodynamic data has been made in the present description of the Li-Mg system compared with the previous assessments. The artificial phase equilibria, which exist in the previous optimization, have been eliminated. The obtained thermodynamic description for the Li-Mg system is then combined with those for the Al-Mg and Al-Li systems to form a basis for a ternary assessment. A set of self-consistent thermodynamic parameters for the Al-Li-Mg system is then obtained. Comparisons between the calculated and experimental results in the Al-Li-Mg system show that the present description can account for the experimental data satisfactorily. (C) 2011 Elsevier Ltd. All rights reserved.