Neutron and x-ray studies of TiAl-Nb intermetallics undergone high-pressure torsion

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dc.contributor.authorLi, Xen_AU
dc.contributor.authorDippenaar, RJen_AU
dc.contributor.authorKawasaki, Men_AU
dc.contributor.authorLiss, KDen_AU
dc.date.accessioned2021-10-27T21:08:27Zen_AU
dc.date.available2021-10-27T21:08:27Zen_AU
dc.date.issued2016-11-29en_AU
dc.date.statistics2021-10-12en_AU
dc.description.abstractHigh-pressure torsion is a severe-plastic-deformation technique rendering the bulk metallic material into an ultrafine microstructure. Not only the application of high pressure in the 6 GPa range bears potential for phase transformation, moreover huge plastic shear strains of 10 to 100 is achieved by torsion processing. In a first study, pellets of y-based Ti-45Al-7.5Nb have been processed under 6 GPa at room temperature, (i) with pressure loading and unloading only, (ii) with 5 turns of torsion and (ii) 10 turns. The material, which usually is brittle and hard to deform, was successfully processed and showed ductility under these conditions. First investigations by neutron and X-ray diffraction are presented, emphasizing the complementarity of both kinds of quantum beams. While X-rays determine the overall structure, such as close-packing, neutrons are particularly sensitive to the order parameter in the constituting y-TiAl and a2-Ti3Al intermetallic phases. It is found that the atomic order decreases on larger amount of processing. Also structural transformations regarding the atomic packing take place. These preliminary examinations open routes for physical understanding and recovery of the occurring crystallographic transformation and microstructural arrangements.en_AU
dc.identifier.citationLi, X., Dippenaar, R., Kawasaki, M., & Liss, K.-D. (2016). Neutron and x-ray studies of TiAl-Nb intermetallics undergone high-pressure torsion. Paper presented at 13th AINSE-ANBUG Neutron Scattering Symposium, Sydney, NSW, Australia, 29-30 November 2016.en_AU
dc.identifier.conferenceenddate30 November 2016en_AU
dc.identifier.conferencename13th AINSE-ANBUG Neutron Scattering Symposiumen_AU
dc.identifier.conferenceplaceSydney, NSW, Australiaen_AU
dc.identifier.conferencestartdate29 November 2016en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12132en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineeringen_AU
dc.subjectPressure range mega pa 10-100en_AU
dc.subjectTorsionen_AU
dc.subjectDeformationen_AU
dc.subjectPhase transformationsen_AU
dc.subjectDuctilityen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectIntermetallic compoundsen_AU
dc.subjectMicrostructureen_AU
dc.subjectCrystallographyen_AU
dc.titleNeutron and x-ray studies of TiAl-Nb intermetallics undergone high-pressure torsionen_AU
dc.typeConference Abstracten_AU
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