Creep deformation mechanisms in a γ titanium aluminide

Z. Abdallah, Rengen Ding, Nigel Martin, Mark Duxib, Martin Bache

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
254 Downloads (Pure)


Titanium aluminides (TiAl) are considered as potential alternatives to replace nickel-based alloys of greater density for selected components within future gas turbine aero-engines. This is attributed to the high specific strength as well as the good oxidation resistance at elevated temperatures. The gamma (γ) titanium aluminide system Ti-45Al-2Mn-2Nb has previously demonstrated promising performance in terms of its physical and mechanical properties. The main aim of the current study, which is a continuation of a previously published paper, aims at evaluating the performance of this titanium aluminide system under high temperature creep conditions. Of particular interest, the paper is strongly demonstrating the precise capability of the Wilshire Equations technique in predicting the long-term creep behaviour of this alloy. Moreover, it presents a physically meaningful understanding of the various creep mechanisms expected under various testing conditions. To achieve this, two creep specimens, tested under distinctly different stress levels at 700 °C have been extensively examined. Detailed microstructural investigations and supporting transmission electron microscopy (TEM) have explored the differences in creep mechanisms active under the two stress regimes, with the deformation mechanisms correlated to Wilshire creep life prediction curves.
Original languageEnglish
Pages (from-to)616-623
JournalMaterials Science and Engineering A
Early online date27 Jul 2016
Publication statusPublished - 15 Sept 2016


  • Titanium aluminides
  • Intermetallics
  • Creep
  • Wilshire equations
  • TEM


Dive into the research topics of 'Creep deformation mechanisms in a γ titanium aluminide'. Together they form a unique fingerprint.

Cite this