Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling
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...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier
2017
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| Online Access: | http://hdl.handle.net/1721.1/108637 https://orcid.org/0000-0001-7804-5418 |
| _version_ | 1811069855209619456 |
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| author | Hofmann, F. Nguyen-Manh, D. Gilbert, M.R. Beck, C.E. Liu, W. Armstrong, D.E.J. Dudarev, S.L. Eliason, Jeffrey Kristian Maznev, Alexei Nelson, Keith Adam |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Hofmann, F. Nguyen-Manh, D. Gilbert, M.R. Beck, C.E. Liu, W. Armstrong, D.E.J. Dudarev, S.L. Eliason, Jeffrey Kristian Maznev, Alexei Nelson, Keith Adam |
| author_sort | Hofmann, F. |
| collection | MIT |
| 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. |
| first_indexed | 2024-09-23T08:18:01Z |
| format | Article |
| id | mit-1721.1/108637 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:18:01Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1086372022-09-23T12:08:19Z Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling Hofmann, F. Nguyen-Manh, D. Gilbert, M.R. Beck, C.E. Liu, W. Armstrong, D.E.J. Dudarev, S.L. Eliason, Jeffrey Kristian Maznev, Alexei Nelson, Keith Adam Massachusetts Institute of Technology. Department of Chemistry Eliason, Jeffrey Kristian Maznev, Alexei Nelson, Keith Adam 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. National Science Foundation (U.S.) (CHE-1111557) 2017-05-03T15:48:11Z 2017-05-03T15:48:11Z 2015-02 2015-01 Article http://purl.org/eprint/type/JournalArticle 1359-6454 1873-2453 http://hdl.handle.net/1721.1/108637 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 https://orcid.org/0000-0001-7804-5418 en_US http://dx.doi.org/10.1016/j.actamat.2015.01.055 Acta Materialia Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier arXiv |
| spellingShingle | Hofmann, F. Nguyen-Manh, D. Gilbert, M.R. Beck, C.E. Liu, W. Armstrong, D.E.J. Dudarev, S.L. Eliason, Jeffrey Kristian Maznev, Alexei Nelson, Keith Adam Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling |
| title | Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling |
| title_full | Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling |
| title_fullStr | Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling |
| title_full_unstemmed | Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling |
| title_short | Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling |
| title_sort | lattice swelling and modulus change in a helium implanted tungsten alloy x ray micro diffraction surface acoustic wave measurements and multiscale modelling |
| url | http://hdl.handle.net/1721.1/108637 https://orcid.org/0000-0001-7804-5418 |
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