Precipitation, recovery, phase transition and recrystallization processes of massively transformed TiAI scrutinized by ex- and in-situ high-energy X-ray diffraction
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Date
2005-01-31
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
High-energy synchrotron radiation above 100 keV is a novel and sophisticated probe to access the volume properties of materials. A Debye-Scherrer method is shortly presented for the measurements of textures, strain and composition. Low density, high specific yield strength, good oxidation resistance and good creep properties at elevated temperatures make intermetallic γ-TiAl-based alloys top candidates as structural materials for advanced jet and automotive engines as well as for future hypersonic vehicles. The mechanical properties depend strongly on composition, thermo mechanical processing and subsequent heat treatments. The present study examines the recrystallization processes of a massively transformed specimen of Ti45AI46Nb9 upon a heat ramp from room temperature to 1400 deg C. The registered Debye-Scherrer rings are rich of features relating to thermal expansion, phase changes, domain and phase coherences, chemical separation and much more which will be regarded in detail.
Description
Keywords
Alloys, Bremsstrahlung, Chemical reactions, Coherent scattering, Diffraction, Diffraction methods, Electromagnetic radiation, Elements, Energy range, Expansion, Mechanical properties, Metals, Physical properties, Radiations, Refractory metals, Scattering, Separation processes, Transition elements
Citation
Liss, K.-D., Bystrzanowski, S., Bartels, A., Buslaps, T., Clemens, H., Gerling, R. Schimansky, F.-P. & Stark, A(2005). Precipitation, recovery, phase transition and recrystallization processes of massively transformed TiAI scrutinized by ex- and in-situ high-energy X-ray diffraction. Paper presented to the 29th Condensed Matter and Materials Meeting, "Australian Institute of Physics Sixteenth Biennial Congress", Canberra, 2005, 31 January - 4 February 2005.