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Phase diagrams of ternary and quaternary
Ti-Al based systems
The thermodynamic properties of two g-TiAl based systems Ti-Al-Mo and Ti-Al-
Nb-Mo are investigated and described. A new thermodynamic description of the
Ti-Al-Mo ternary system in the Ti-rich region is provided.
The thermodynamic quantities such as Gibbs energies
are modeled based on the CALPHAD method.
Again, the thermodynamic functions of the phases of
interest (a, a2, b and g) in the Ti-Al-Mo system are
optimized by using the PARROT module of software
ThermoCalc. An acceptable agreement between the
calculations and experimental data in the quaternaryTi-Al-Nb-Mo
system in the a, a2, b and g-region is
achieved (Fig. 2).
Yuhong Liu
Institut für Mechanik
an der MUL seit: 2006
Email: yuhong.liu@unileoben.ac.at
Zur Person:
Graduated at Beijing University of Technology
The ternary interaction parameters are optimized by the
PARROT module of the ThermoCalc software. The model
parameters were evaluated by searching for the best fit
of the available experimental data. The optimization is
focussed on the range of 0~30 Mo at.% and temperature
higher than 1000 K (Fig.1).
Forschungspartner:
Prof. H. Clemens, Prof. G. Dehm, Prof. C. Draxl
Prof. F. D. Fischer, Priv.-Doz. Dr. E. Gamsjäger
Dr. J. Svoboda
Forschungsschwerpunkte:
Modeling of phase diagram
Theory and experimental characterization of phase transformations
in Ti-Al based alloys