Bragg-edge neutron strain imaging and tomography

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dc.contributor.authorWensrich, Cen_AU
dc.contributor.authorGregg, AWTen_AU
dc.contributor.authorHendriks, JNen_AU
dc.contributor.authorLuzin, Ven_AU
dc.contributor.authorShinohara, Ten_AU
dc.contributor.authorKirstein, Oen_AU
dc.contributor.authorMeylan, MHen_AU
dc.contributor.authorKisi, EHen_AU
dc.date.accessioned2023-12-07T23:03:38Zen_AU
dc.date.available2023-12-07T23:03:38Zen_AU
dc.date.issued2018-11-18en_AU
dc.date.statistics2023-05-29en_AU
dc.description.abstractFor more than 10 years, time-of-flight detectors at pulsed neutron sources have been capable of providing high-resolution images of strain fields through Bragg-edge analysis [1]. With a geometry akin to a traditional radiograph, these images represent a projection of the full 3D tensor strain distribution to a scalar field. This poses a rich tomography problem based on a generalised version of the Radon transform known as the Longitudinal Ray Transform (LRT). The solution to this Bragg-edge strain tomography problem promises a new approach by which the full triaxial elastic strain (and hence stress) distribution could be observed within crystalline solids over the scale of centimetres. This presentation will provide an overview of Bragg-edge imaging and strain measurement before outlining recent work by the Authors focused on solving the associated tomography problem. The central issue that rendered the problem ill-posed will be discussed before introducing a range of approaches based on equilibrium constraints. A two dimensional experimental demonstration based on data from the RADEN energy-resolved imaging instrument (at J-PARC in Japan) will be presented with comparisons to detailed constant wavelength strain scans from the KOWARI diffractometer (ANSTO). The generalisation of this approach to three-dimensions will also be discussed. [1] Tremsin et al. “High-resolution strain mapping through time-of-flight neutron transmission diffraction with a microchannel plate neutron counting detector”, Strain, v48 pp296-305, 2012. © The Authorsen_AU
dc.identifier.citationWensrich, C., Gregg, A., Hendriks, J., Luzin, V., Shinohara, T., Kirstein, O., Meylan, M., Kisi, E. (2018). Bragg-edge neutron strain imaging and tomography. Presentedto the ANBUG-AINSE Neutron Scattering Symposium, AANSS 2018, AINSE Conference Centre New Illawarra Road Lucas Heights NSW 2234, Australia, Monday 19 November 2018 - Wednesday 21 November 2018, (pp. 15). Retrieved from https://events01.synchrotron.org.au/event/84/book-of-abstracts.pdfen_AU
dc.identifier.conferenceenddate2018-11-21en_AU
dc.identifier.conferencenameANBUG-AINSE Neutron Scattering Symposium, AANSS 2018en_AU
dc.identifier.conferenceplaceLucas Heights, New South Walesen_AU
dc.identifier.conferencestartdate2018-11-19en_AU
dc.identifier.pagination15en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15273en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineering (AINSE)en_AU
dc.relation.urihttps://events01.synchrotron.org.au/event/84/book-of-abstracts.pdfen_AU
dc.subjectStrainsen_AU
dc.subjectStressesen_AU
dc.subjectNeutronsen_AU
dc.subjectANSTOen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectWavelengthsen_AU
dc.subjectTomographyen_AU
dc.titleBragg-edge neutron strain imaging and tomographyen_AU
dc.typeConference Abstracten_AU
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