Abstract
Abstract Solid solubility of titanium in Al alloys with respect to D022 Al3Ti ordered compound is calculated by the linear muffin-tin orbitals method in conjunction with the cluster variation method with a restricted isothermal isobaric partition function scheme. The contribution of vibrational entropy to total energy is considered by incorporating the Debye-Gruneisen analysis in the results of band calculations. The resulting Al solvus line shows fair agreement with experiment. In addition, the solvus line exhibits a linear dependence on hydrostatic pressure. The solubility of Ti in the Al alloy decreases 11 % for every 10kbar of compressive stress
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