Thermodynamic assessment of the Nb-Ti system

The thermodynamic properties of the Nb-Ti system have been evaluated by usi ng a regular solution model to describe the Gibbs energies of various phase s including both equilibrium and metastable phases. A set of thermodynamic parameters more consistent with most of the selected experimental data than previous assessments has been obtained. Stable and metastable phase equili bria, T-0 loci, metastable chemical spinodal curve of beta phase and thermo dynamic properties are calculated with the optimized parameters. With the t hermodynamic parameters obtained in this work, authors discuss the possible occurrence range of omega phase.