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dc.contributor.authorHofmann, F.
dc.contributor.authorNguyen-Manh, D.
dc.contributor.authorGilbert, M.R.
dc.contributor.authorBeck, C.E.
dc.contributor.authorLiu, W.
dc.contributor.authorArmstrong, D.E.J.
dc.contributor.authorDudarev, S.L.
dc.contributor.authorEliason, Jeffrey Kristian
dc.contributor.authorMaznev, Alexei
dc.contributor.authorNelson, Keith Adam
dc.date.accessioned2017-05-03T15:48:11Z
dc.date.available2017-05-03T15:48:11Z
dc.date.issued2015-02
dc.date.submitted2015-01
dc.identifier.issn1359-6454
dc.identifier.issn1873-2453
dc.identifier.urihttp://hdl.handle.net/1721.1/108637
dc.description.abstractUsing X-ray micro-diffraction and surface acoustic wave spectroscopy, we measure lattice swelling and elastic modulus changes in a W-1% Re alloy after implantation with 3110 appm of helium. An observed lattice expansion of a fraction of a per cent gives rise to an order of magnitude larger reduction in the surface acoustic wave velocity. A multiscale model, combining elasticity and density functional theory, is applied to the interpretation of observations. The measured lattice swelling is consistent with the relaxation volume of self-interstitial and helium-filled vacancy defects that dominate the helium-implanted material microstructure. Larger scale atomistic simulations using an empirical potential confirm the findings of the elasticity and density functional theory model for swelling. The reduction of surface acoustic wave velocity predicted by density functional theory calculations agrees remarkably well with experimental observations.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (CHE-1111557)en_US
dc.language.isoen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.actamat.2015.01.055en_US
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs Licenseen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.sourcearXiven_US
dc.titleLattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modellingen_US
dc.typeArticleen_US
dc.identifier.citationHofmann, F.; Nguyen-Manh, D.; Gilbert, M.R.; Beck, C.E.; Eliason, J.K.; Maznev, A.A.; Liu, W.; Armstrong, D.E.J.; Nelson, K.A. and Dudarev, S.L. “Lattice Swelling and Modulus Change in a Helium-Implanted Tungsten Alloy: X-Ray Micro-Diffraction, Surface Acoustic Wave Measurements, and Multiscale Modelling.” Acta Materialia 89 (May 2015): 352–363. © 2015 Acta Materialia Inc. Published by Elsevier Ltden_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Chemistryen_US
dc.contributor.mitauthorEliason, Jeffrey Kristian
dc.contributor.mitauthorMaznev, Alexei
dc.contributor.mitauthorNelson, Keith Adam
dc.relation.journalActa Materialiaen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsHofmann, F.; Nguyen-Manh, D.; Gilbert, M.R.; Beck, C.E.; Eliason, J.K.; Maznev, A.A.; Liu, W.; Armstrong, D.E.J.; Nelson, K.A.; Dudarev, S.L.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0001-7804-5418
mit.licensePUBLISHER_CCen_US


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