Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation
Atomistic modeling is used to investigate the shear resistance and interaction with point defects of a Cu–Nb interface found in nanocomposites synthesized by severe plastic deformation. The shear resistance of this interface is highly anisotropic: in one direction shearing occurs at stresses <120...
| Main Authors: | , |
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| Format: | Article |
| Language: | en_US |
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Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/101912 https://orcid.org/0000-0003-3949-0441 |
| _version_ | 1811068595724091392 |
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| author | Thilly, L. Demkowicz, Michael J. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Thilly, L. Demkowicz, Michael J. |
| author_sort | Thilly, L. |
| collection | MIT |
| description | Atomistic modeling is used to investigate the shear resistance and interaction with point defects of a Cu–Nb interface found in nanocomposites synthesized by severe plastic deformation. The shear resistance of this interface is highly anisotropic: in one direction shearing occurs at stresses <1200 MPa, while in the other it does not occur at all. The binding energy of vacancies, interstitials and He impurities to this interface depends sensitively on the binding location, but there is no point defect delocalization, nor does this interface contain any constitutional defects. These behaviors are markedly dissimilar from a different Cu–Nb interface found in magnetron sputtered composites. The dissimilarities may, however, be explained by quantitative differences in the detailed structure of these two interfaces. |
| first_indexed | 2024-09-23T07:58:16Z |
| format | Article |
| id | mit-1721.1/101912 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T07:58:16Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1019122022-09-30T01:25:19Z Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation Thilly, L. Demkowicz, Michael J. Massachusetts Institute of Technology. Department of Materials Science and Engineering Demkowicz, Michael J. Demkowicz, Michael J. Atomistic modeling is used to investigate the shear resistance and interaction with point defects of a Cu–Nb interface found in nanocomposites synthesized by severe plastic deformation. The shear resistance of this interface is highly anisotropic: in one direction shearing occurs at stresses <1200 MPa, while in the other it does not occur at all. The binding energy of vacancies, interstitials and He impurities to this interface depends sensitively on the binding location, but there is no point defect delocalization, nor does this interface contain any constitutional defects. These behaviors are markedly dissimilar from a different Cu–Nb interface found in magnetron sputtered composites. The dissimilarities may, however, be explained by quantitative differences in the detailed structure of these two interfaces. MISTI-France Seed Fund 2016-03-29T19:06:49Z 2016-03-29T19:06:49Z 2011-10 2011-09 Article http://purl.org/eprint/type/JournalArticle 13596454 1873-2453 http://hdl.handle.net/1721.1/101912 Demkowicz, M.J., and L. Thilly. “Structure, Shear Resistance and Interaction with Point Defects of Interfaces in Cu–Nb Nanocomposites Synthesized by Severe Plastic Deformation.” Acta Materialia 59, no. 20 (December 2011): 7744–7756. https://orcid.org/0000-0003-3949-0441 en_US http://dx.doi.org/10.1016/j.actamat.2011.09.004 Acta Materialia Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Demkowicz via Angie Locknar |
| spellingShingle | Thilly, L. Demkowicz, Michael J. Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation |
| title | Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation |
| title_full | Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation |
| title_fullStr | Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation |
| title_full_unstemmed | Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation |
| title_short | Structure, shear resistance and interaction with point defects of interfaces in Cu–Nb nanocomposites synthesized by severe plastic deformation |
| title_sort | structure shear resistance and interaction with point defects of interfaces in cu nb nanocomposites synthesized by severe plastic deformation |
| url | http://hdl.handle.net/1721.1/101912 https://orcid.org/0000-0003-3949-0441 |
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