Phase transition and ordering behavior of ternary Ti-Al-Mo alloys using in-situ neutron diffractionFaculty of Engineering - Papers (Archive)
AbstractNeutron 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.
Citation InformationSaurabh 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/