Determination of the relative magnitudes of static and dynamic displacements in High Entropy Alloys

DOI

The width of a peak in a pair distribution function (PDF) provides a measure of the variation in the distance between a pair of atoms. This results from a combination of thermal vibrations and static displacements - the latter being a key concept when investigating structure-property relationships. We propose to probe the relative magnitudes of the two effects through analysis of the PDF of a High Entropy Alloy (HEA - a multicomponent alloy which reportedly exhibits anomalously large static displacements) at several temperatures. At low temperature the thermal vibrations will be minimised, allowing a truer estimation of the magnitude of static disorder. Through comparison with equivalent data obtained from simpler alloys we aim to determine the true level of local strain in an HEA - a result which may challenge one of the core concepts of HEA research.

Identifier
DOI https://doi.org/10.5286/ISIS.E.82886481
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/82886481
Provenance
Creator Dr Lewis Owen; Dr Nick Jones; Dr Howard Stone; Dr Helen Playford
Publisher ISIS Neutron and Muon Source
Publication Year 2019
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 2016-10-09T23:00:00Z
Temporal Coverage End 2016-10-11T23:00:00Z