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Title: Phase transition and ordering behavior of ternary Ti-Al-Mo alloys using in-situ neutron diffraction
Authors: Kabra, S
Yan, K
Mayer, S
Schmoelzer, T
Reid, M
Dippenaar, RJ
Clemens, H
Liss, KD
Keywords: Phase diagrams
Phase transformations
Neutron diffraction
Synchrotron radiation
X-ray diffraction
In-situ processing
Issue Date: 1-Jun-2011
Publisher: HANSER eLibrary
Citation: Kabra, S., Yan, K., Mayer, S., Schmoelzer, T., Reid, M., Dippenaar, R., Clemens, H., Liss, K.D. (2011). Phase transition and ordering behavior of ternary Ti-Al-Mo alloys using in-situ neutron diffraction. International Journal of Materials Research, 102(6, SI), 697-702. doi:10.3139/146.110528
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 alpha(2), beta(0) and gamma and two disordered phases, alpha and beta, 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. © 2011 Carl Hanser Verlag GmbH & Co. KG
Gov't Doc #: 3889
ISSN: 1862-5282
Appears in Collections:Journal Articles

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