In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS
<p><strong>Background</strong></p> Bragg edge imaging have seen significant developments in the last decade with the availability of new time-resolved detectors, however, there have been no studies of changes in local coherent scattering from grain reorientation and deformati...
| Main Authors: | , , , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
Springer
2021
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| _version_ | 1826307303244038144 |
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| author | Zillhardt, TAC Burca, G Liu, D Marrow, TJ |
| author_facet | Zillhardt, TAC Burca, G Liu, D Marrow, TJ |
| author_sort | Zillhardt, TAC |
| collection | OXFORD |
| description | <p><strong>Background</strong></p>
Bragg edge imaging have seen significant developments in the last decade with the availability of new time-resolved detectors, however, there have been no studies of changes in local coherent scattering from grain reorientation and deformation with load. Such damage accommodation mechanism may occur in (quasi)-brittle materials.
<p><strong>Objective</strong></p>
We developed a novel method using in-situ Bragg imaging at the ISIS spallation neutron and muon source on the IMAT (Imaging and MATerials science and engineering) instrument using an energy-resolved detector setup. We collected and analysed data of a proof-of-concept experiment demonstrating the use of the method.
<p><strong>Methods</strong></p>
We have developed a loading apparatus that addresses the constraints posed by Bragg imaging, allowing us to resolve features in the material microstructure. We use energy-resolved neutron imaging to obtain images in energy bins and we have developed a set of codes to register and correlate these images, as well as detect changes in local coherent scattering, in situ.
<p><strong>Results</strong></p>
Preliminary results from this method on Gilsocarbon nuclear graphite allow qualitative observation of local changes in Bragg contrast, which may be due to deformation or grain reorientation.
<p><strong>Conclusions</strong></p>
We have demonstrated that we can track changes in local coherent scattering under mechanical load, with sufficient resolution to track features with a size above 100 microns. This method, apparatus and accompanying codes may be used on the IMAT instruments by users interested to better understand deformation in their materials. |
| first_indexed | 2024-03-07T07:01:06Z |
| format | Journal article |
| id | oxford-uuid:11cf0b97-2970-481f-a1e2-3abe52fcd9f2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:01:06Z |
| publishDate | 2021 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:11cf0b97-2970-481f-a1e2-3abe52fcd9f22022-03-28T13:40:14ZIn situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISISJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:11cf0b97-2970-481f-a1e2-3abe52fcd9f2EnglishSymplectic ElementsSpringer2021Zillhardt, TACBurca, GLiu, DMarrow, TJ<p><strong>Background</strong></p> Bragg edge imaging have seen significant developments in the last decade with the availability of new time-resolved detectors, however, there have been no studies of changes in local coherent scattering from grain reorientation and deformation with load. Such damage accommodation mechanism may occur in (quasi)-brittle materials. <p><strong>Objective</strong></p> We developed a novel method using in-situ Bragg imaging at the ISIS spallation neutron and muon source on the IMAT (Imaging and MATerials science and engineering) instrument using an energy-resolved detector setup. We collected and analysed data of a proof-of-concept experiment demonstrating the use of the method. <p><strong>Methods</strong></p> We have developed a loading apparatus that addresses the constraints posed by Bragg imaging, allowing us to resolve features in the material microstructure. We use energy-resolved neutron imaging to obtain images in energy bins and we have developed a set of codes to register and correlate these images, as well as detect changes in local coherent scattering, in situ. <p><strong>Results</strong></p> Preliminary results from this method on Gilsocarbon nuclear graphite allow qualitative observation of local changes in Bragg contrast, which may be due to deformation or grain reorientation. <p><strong>Conclusions</strong></p> We have demonstrated that we can track changes in local coherent scattering under mechanical load, with sufficient resolution to track features with a size above 100 microns. This method, apparatus and accompanying codes may be used on the IMAT instruments by users interested to better understand deformation in their materials. |
| spellingShingle | Zillhardt, TAC Burca, G Liu, D Marrow, TJ In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS |
| title | In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS |
| title_full | In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS |
| title_fullStr | In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS |
| title_full_unstemmed | In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS |
| title_short | In situ mechanical loading and neutron Bragg-edge imaging, applied to polygranular graphite on IMAT@ISIS |
| title_sort | in situ mechanical loading and neutron bragg edge imaging applied to polygranular graphite on imat isis |
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