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Time-resolved synchrotron tomographic quantification of deformation during indentation of an equiaxed semi-solid granular alloy

Cai, B; Lee, PD; Karagadde, S; Marrow, TJ; Connolley, T; (2016) Time-resolved synchrotron tomographic quantification of deformation during indentation of an equiaxed semi-solid granular alloy. Acta Materialia , 105 pp. 338-346. 10.1016/j.actamat.2015.11.028. Green open access

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Abstract

Indentation is a well-established technique for measuring mechanical properties, such as hardness and creep, in solid materials at a continuum level. In this study, we performed indentation of a semi-solid granular alloy with an equiaxed dendritic microstructure. The resulting microstructural effects were quantified using a novel thermo-mechanical setup combined with 4D (three spatial dimensions plus time) synchrotron tomography and digital volume correlation. The experiments not only revealed the multitude of deformation mechanisms occurring at a microstructural level, (e.g. dilatancy, liquid flow, macrosegregation, shrinkage voids, and intra-granular deformation), but also allowed quantification of the evolution of the strain fields within the material. The resulting methodology is a powerful tool for assessing the evolution of localized deformation and hence material properties.

Type: Article
Title: Time-resolved synchrotron tomographic quantification of deformation during indentation of an equiaxed semi-solid granular alloy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.actamat.2015.11.028
Publisher version: https://doi.org/10.1016/j.actamat.2015.11.028
Language: English
Additional information: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Granular materials, Semi-solid, Indentation, X-ray tomography, Digital volume correlation
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10062981
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