3D studies of indentation by combined X-ray tomography and digital volume correlation
Hardness testing obtains material properties from small specimens via measurement of load-displacement response to an imposed indentation; it is a surface characterisation technique so, except in optically transparent materials, there is no direct observation of the assumed damage and deformation pr...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Trans Tech Publications
2013
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| Subjects: |
| _version_ | 1797082333307731968 |
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| author | Mostafavi, M Vertyagina, Y Reinhard, C Bradley, R Jiang, X Galano, M Marrow, J |
| author_facet | Mostafavi, M Vertyagina, Y Reinhard, C Bradley, R Jiang, X Galano, M Marrow, J |
| author_sort | Mostafavi, M |
| collection | OXFORD |
| description | Hardness testing obtains material properties from small specimens via measurement of load-displacement response to an imposed indentation; it is a surface characterisation technique so, except in optically transparent materials, there is no direct observation of the assumed damage and deformation processes within the material. Three-dimensional digital image correlation (digital volume correlation) is applied to study deformation <em>beneath</em> indentations, mapping the relative displacements between high-resolution synchrotron X-ray computed tomographs (0.9 μm voxel size). Two classes of material are examined: ductile aluminium-silicon carbide composite (Al-SiC) and brittle alumina (Al<sub>2</sub>O<sub>3</sub>). The measured displacements for Hertzian indentation in Al-SiC are in good agreement with an elastic-plastic finite element simulation. In alumina, radial cracking is observed beneath a Vickers indentation and the crack opening displacements are measured, in situ under load, for the first time. Potential applications are discussed of this characterization technique, which does not require resolution of microstructural features. |
| first_indexed | 2024-03-07T01:26:41Z |
| format | Journal article |
| id | oxford-uuid:9236f1a6-14c4-45a5-bf7e-ef6b932276dc |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:26:41Z |
| publishDate | 2013 |
| publisher | Trans Tech Publications |
| record_format | dspace |
| spelling | oxford-uuid:9236f1a6-14c4-45a5-bf7e-ef6b932276dc2022-03-26T23:23:56Z3D studies of indentation by combined X-ray tomography and digital volume correlationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9236f1a6-14c4-45a5-bf7e-ef6b932276dcMaterials SciencesEnglishSymplectic Elements at OxfordTrans Tech Publications2013Mostafavi, MVertyagina, YReinhard, CBradley, RJiang, XGalano, MMarrow, JHardness testing obtains material properties from small specimens via measurement of load-displacement response to an imposed indentation; it is a surface characterisation technique so, except in optically transparent materials, there is no direct observation of the assumed damage and deformation processes within the material. Three-dimensional digital image correlation (digital volume correlation) is applied to study deformation <em>beneath</em> indentations, mapping the relative displacements between high-resolution synchrotron X-ray computed tomographs (0.9 μm voxel size). Two classes of material are examined: ductile aluminium-silicon carbide composite (Al-SiC) and brittle alumina (Al<sub>2</sub>O<sub>3</sub>). The measured displacements for Hertzian indentation in Al-SiC are in good agreement with an elastic-plastic finite element simulation. In alumina, radial cracking is observed beneath a Vickers indentation and the crack opening displacements are measured, in situ under load, for the first time. Potential applications are discussed of this characterization technique, which does not require resolution of microstructural features. |
| spellingShingle | Materials Sciences Mostafavi, M Vertyagina, Y Reinhard, C Bradley, R Jiang, X Galano, M Marrow, J 3D studies of indentation by combined X-ray tomography and digital volume correlation |
| title | 3D studies of indentation by combined X-ray tomography and digital volume correlation |
| title_full | 3D studies of indentation by combined X-ray tomography and digital volume correlation |
| title_fullStr | 3D studies of indentation by combined X-ray tomography and digital volume correlation |
| title_full_unstemmed | 3D studies of indentation by combined X-ray tomography and digital volume correlation |
| title_short | 3D studies of indentation by combined X-ray tomography and digital volume correlation |
| title_sort | 3d studies of indentation by combined x ray tomography and digital volume correlation |
| topic | Materials Sciences |
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