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Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling

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dc.contributor Massachusetts Institute of Technology. Department of Chemistry
dc.contributor Eliason, Jeffrey Kristian
dc.contributor Maznev, Alexei
dc.contributor Nelson, Keith Adam
dc.creator Hofmann, F.
dc.creator Nguyen-Manh, D.
dc.creator Gilbert, M.R.
dc.creator Beck, C.E.
dc.creator Liu, W.
dc.creator Armstrong, D.E.J.
dc.creator Dudarev, S.L.
dc.creator Eliason, Jeffrey Kristian
dc.creator Maznev, Alexei
dc.creator Nelson, Keith Adam
dc.date 2017-05-03T15:48:11Z
dc.date 2017-05-03T15:48:11Z
dc.date 2015-02
dc.date 2015-01
dc.date.accessioned 2023-03-01T18:11:46Z
dc.date.available 2023-03-01T18:11:46Z
dc.identifier 1359-6454
dc.identifier 1873-2453
dc.identifier http://hdl.handle.net/1721.1/108637
dc.identifier Hofmann, 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 Ltd
dc.identifier https://orcid.org/0000-0001-7804-5418
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/279111
dc.description Using 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.
dc.description National Science Foundation (U.S.) (CHE-1111557)
dc.format application/pdf
dc.language en_US
dc.publisher Elsevier
dc.relation http://dx.doi.org/10.1016/j.actamat.2015.01.055
dc.relation Acta Materialia
dc.rights Creative Commons Attribution-NonCommercial-NoDerivs License
dc.rights http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.source arXiv
dc.title Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling
dc.type Article
dc.type http://purl.org/eprint/type/JournalArticle


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