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Experimental Studies and Thermodynamic Simulation of Phase Transformations in γ-TiAl Based Alloys

  • Harald F. Chladil (a1), Helmut Clemens (a1), Harald Leitner (a1), Arno Bartels (a2), Rainer Gerling (a3), Wilfried T. Marketz (a4) and Ernst Kozeschnik (a5)...

Abstract

Phase transformations and phase transition temperatures in several Nb-rich γ-TiAl based alloys were investigated experimentally and compared to thermodynamic simulations. The present study combines light-optical and scanning electron microscopy, X-ray diffraction and differential-scanning-calorimetry for the characterization of the prevailing phases and phase transformations. Thermodynamic simulation based on the CALPHAD method was used for predict phase stabilities. The results from experiments on a variety of γ-TiAl based alloys are compared to thermodynamic calculations. Finally, the influence of carbon on the transition temperatures is presented.

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Experimental Studies and Thermodynamic Simulation of Phase Transformations in γ-TiAl Based Alloys

  • Harald F. Chladil (a1), Helmut Clemens (a1), Harald Leitner (a1), Arno Bartels (a2), Rainer Gerling (a3), Wilfried T. Marketz (a4) and Ernst Kozeschnik (a5)...

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