Experimental studies and thermodynamic simulation of phase transformations in high Nb containing γ-TiAl based alloys

Harald F. Chladil, Helmut Clemens*, Gerald A. Zickler, Masao Takeyama, Ernst Kozeschnik, Arno Bartels, Thomas Buslaps, Rainer Gerling, Sascha Kremmer, La Reine Yeoh, Klaus Dieter Liss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Solid-state phase transformations and phase transition temperatures in Ti-45at.% 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.

Original languageEnglish
Pages (from-to)1131-1137
Number of pages7
JournalInternational Journal of Materials Research
Volume98
Issue number11
DOIs
StatePublished - Nov 2007
Externally publishedYes

Keywords

  • Alloying
  • Microstructure
  • Phase prediction
  • Phase transitions
  • Titanium aluminides

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