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Article
Phase transition and ordering behavior of ternary Ti-Al-Mo alloys using in-situ neutron diffraction
Faculty of Engineering - Papers (Archive)
  • Saurabh Kabra, Australian Nuclear Science and Technology Organisa
  • Kun Yan
  • Svea Mayer, Dept of Physical Metallurgy and Materials, Austria
  • Thomas Schmoelzer, Montanuniversitat
  • Mark H Reid, University of Wollongong
  • Rian J Dippenaar, University of Wollongong
  • Helmut Clemens, Montanuniversitat
  • Klaus-Dieter Liss, ANSTO
RIS ID
40839
Publication Date
1-1-2011
Publication Details

Kabra, S., Yan, K., Mayer, S., Schmoelzer, T., Reid, M., Dippenaar, R. J., Clemens, H. Liss, K. (2011). Phase transition and ordering behavior of ternary Ti-Al-Mo alloys using in-situ neutron diffraction. International Journal of Materials Research, 102 (6), 697-702.

Abstract

Neutron diffraction has been used for in-situ investigations to elucidate the phase transformation behavior of two Mo-containing TiAl alloys with compositions of Ti-44Al-3Mo and Ti-44Al-7Mo (in at.%). Five different phases are present in these alloys. These include three ordered phases at room temperature, namely α2, β0 and γ and two disordered phases, α and β, which occur at higher temperatures. The sequence of the three phase transformations in each alloy has been determined. The phase transformation and disordering/ordering temperatures were determined on heating and cooling from the diffracted peak intensities. The neutron experiments are particularly sensitive to the order – disorder transitions in TiAl alloys, which are compared with the overall phase fractions obtained from previous high energy X-ray diffraction. Hysteresis and undercooling effects are observed for the various phase transformations and depend on the nature of atomic rearrangements.

Disciplines
Citation Information
Saurabh Kabra, Kun Yan, Svea Mayer, Thomas Schmoelzer, et al.. "Phase transition and ordering behavior of ternary Ti-Al-Mo alloys using in-situ neutron diffraction" (2011) p. 697 - 702
Available at: http://works.bepress.com/kdliss/5/