Evaluation of lattice strains in porous graphite

DOI

Internal stresses and strains are created in the graphite over time as a consequence of exposure to thermal gradients, structural loads and fast neutron irradiation. However, there is no direct experimental evidence of the magnitude of the internal strains. We have conducted a series of laboratory experiments for internal and surface strain measurement on the nuclear graphite using deep-hole drilling [2], incremental centre hole drilling [3] and digital image correlation. In all cases the measured bulk strains were equal to the mechanically applied strains. In contrast, it is unclear how the strain is distributed within the graphite microstructure. The novel purpose of this work is to establish if, and how differences observed between the macro-strains measured by displacement/relaxation and those measured from the crystal lattice can be reconciled particularly for porous graphite.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24079947
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24079947
Provenance
Creator Dr Devashi Adroja; Professor Bo Chen
Publisher ISIS Neutron and Muon Source
Publication Year 2013
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2010-02-18T10:57:07Z
Temporal Coverage End 2010-02-22T18:46:57Z