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Article
In situ study of dynamic recrystallization and hot deformation behavior of a multiphase titanium aluminide alloy
Faculty of Engineering - Papers (Archive)
  • Klaus-Dieter Liss, Australian Nuclear Science & Technology Organisation
  • Thomas Schmoelzer, Montanuniversitat
  • Kun Yan, University of Wollongong
  • Mark H Reid, University of Wollongong
  • Matthew Peel, 4European Synchrotron Radiation Facility
  • Rian J Dippenaar, University of Wollongong
  • Helmut Clemens, Montanuniversitat
RIS ID
32413
Publication Date
1-1-2009
Publication Details

Liss, K., Schmoelzer, T., Yan, K., Reid, M. Henry., Peel, M., Dippenaar, R. J. & Clemens, H. (2009). In situ study of dynamic recrystallization and hot deformation behavior of a multiphase titanium aluminide alloy. Journal of Applied Physics, 106 (11), 113526-1-113526-6. Original journal available here.

Abstract

Hot-compression tests were conducted in a high-energy synchrotron x-ray beam to study in situ and in real time microstructural changes in the bulk of a β-solidifying titanium aluminide alloy. The occupancy and spottiness of the diffraction rings have been evaluated in order to access grain growth and refinement, orientation relationships, subgrain formation, dynamic recovery, and dynamic recrystallization, as well as phase transformations. This method has been applied to an alloy consisting of two coexisting phases at high temperature and it was found that the bcc β-phase recrystallizes dynamically, much faster than the hcp α-phase, which deforms predominantly through crystallographic slip underpinned by a dynamic recovery process with only a small component of dynamic recrystallization. The two phases deform to a very large extent independently from each other. The rapid recrystallization dynamics of the β-phase combined with the easy and isotropic slip characteristics of the bcc structure explain the excellent deformation behavior of the material, while the presence of two phases effectively suppresses grain growth.

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Citation Information
Klaus-Dieter Liss, Thomas Schmoelzer, Kun Yan, Mark H Reid, et al.. "In situ study of dynamic recrystallization and hot deformation behavior of a multiphase titanium aluminide alloy" (2009)
Available at: http://works.bepress.com/kdliss/1/