Intermetallic γ-titanium aluminide (γ-TiAl) based alloys are a class of novel materials developed for high-temperature applications in advanced aero-engines. Due to their high deformation resistance, TiAl alloys are difficult to process which has limited their uptake. During hot-working, recovery and recrystallization effects determine the microstructural evolution and, thereby, critically influence the properties of the finished part. In order to shed light on the processes occurring during hot deformation an in-situ method for studying dynamic recovery and recrystallization phenomena has been employed. A cylindrical sample was heated and illuminated by a highly collimated high energy X-ray beam. The evolution of the diffraction patterns recorded during compressive deformation allowed the identification of the processes that occurred in the different phases. Complementary ex-situ experiments were conducted to verify the obtained in-situ results.
|Translated title of the contribution||Dynamic recovery and recrystallization of a multi-phase TiAl alloy during thermomechanical processing|
|Title of host publication||Recrystallization and Grain Growth IV, Sheffield, UK|
|Publication status||Published - 2010|