Phase equilibria and phase transformations in molybdenum-containing TiAl alloys

Svea Mayer*, Christian Sailer, Hirotoyo Nakashima, Thomas Schmoelzer, Thomas Lippmann, Peter Staron, Klaus Dieter Liss, Helmut Clemens, Masao Takeyama

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

17 Scopus citations


Molybdenum, being a strong β stabilizer, is an important alloying element in TiAl alloys, since a significant volume fraction of the disordered bcc β-phase at elevated temperatures improves the processing characteristics during hot-working. Unfortunately, the effect of Mo on the individual phases and their transition temperatures is not completely known but is necessary for designing engineering applications. In this paper, sections of the Ti-Al-Mo ternary phase diagram derived from thermodynamic calculations as well as experimental data are presented. Further, the phase transition temperatures given by the phase diagrams are compared with results from isothermal heat treatment studies, differential scanning calorimetry measurements and in-situ high-temperature diffraction experiments. Combining all of these results, a revised phase diagram is proposed.

Original languageEnglish
Title of host publicationIntermetallic-Based Alloys for Structural and Functional Applications
Number of pages6
StatePublished - 2011
Externally publishedYes
Event2010 MRS Fall Meeting - Boston, MA, United States
Duration: 29 Nov 20103 Dec 2010

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2010 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA


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