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Experimental studies and thermodynamic simulation of phase transformations in high Nb containing c-TiAl based alloys
Publikationstyp
Journal Article
Publikationsdatum
2007-12-01
Sprache
English
Author
Chladil, Harald F.
Zickler, Gerald A.
Takeyama, Masao
Kozeschnik, Ernst
Buslaps, Thomas
Gerling, Rainer
Kremmer, Sascha
Yeoh, La Reine
Enthalten in
Volume
98
Issue
11
Start Page
1131
End Page
1137
Citation
Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques 98 (11): 1131-1137 (2007-11-01)
Publisher DOI
Scopus ID
Solid-state phase transformations and phase transition temperatures in Ti-45 at.% Al and Ti-45 at.% Al-(5, 7.5, 10) at.% Nb alloys were analyzed experimentally and compared to thermodynamic calculations. Results from scanning electron microscopy, high-energy and conventional X-ray diffraction as well as differential scanning calorimetry were used for the characterization of the prevailing phases and phase transformations. For the prediction of phase stabilities and phase transition temperatures, thermodynamic calculations using the CALPHAD method were conducted. In order to achieve better agreement between calculated and experimental results, a commercially available database was modified using our own results from thermo-physical measurements and annealing treatments.
Schlagworte
Alloying
Microstructure
Phase prediction
Phase transitions
Titanium aluminides
DDC Class
530: Physics
540: Chemistry
541.3: Physical Chemistry