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In situ nano-compression testing of irradiated copper

Increasing demand for energy and reduction of CO(2) emissions has revived interest in nuclear energy. Designing materials for radiation environments necessitates fundamental understanding of how radiation-induced defects alter mechanical properties. Ion beams create radiation damage efficiently with...

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Autores principales: Kiener, D., Hosemann, P., Maloy, S. A., Minor, A. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3145148/
https://www.ncbi.nlm.nih.gov/pubmed/21706011
http://dx.doi.org/10.1038/nmat3055
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author Kiener, D.
Hosemann, P.
Maloy, S. A.
Minor, A. M.
author_facet Kiener, D.
Hosemann, P.
Maloy, S. A.
Minor, A. M.
author_sort Kiener, D.
collection PubMed
description Increasing demand for energy and reduction of CO(2) emissions has revived interest in nuclear energy. Designing materials for radiation environments necessitates fundamental understanding of how radiation-induced defects alter mechanical properties. Ion beams create radiation damage efficiently without material activation, but their limited penetration depth requires small-scale testing. However, strength measurements of nano-scale irradiated specimens have not been previously performed. Here we show that yield strengths approaching macroscopic values are measured from irradiated ~400 nm diameter copper specimens. Quantitative in situ nano-compression testing in a transmission electron microscope reveals that the strength of larger samples is controlled by dislocation-irradiation defect interactions, yielding size-independent strengths. Below ~400 nm, size-dependent strength results from dislocation source limitation. This transition length-scale should be universal, but depend on material and irradiation conditions. We conclude that for irradiated copper, and presumably related materials, nano-scale in situ testing can determine bulk-like yield strengths and simultaneously identify deformation mechanisms.
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spelling pubmed-31451482012-02-01 In situ nano-compression testing of irradiated copper Kiener, D. Hosemann, P. Maloy, S. A. Minor, A. M. Nat Mater Article Increasing demand for energy and reduction of CO(2) emissions has revived interest in nuclear energy. Designing materials for radiation environments necessitates fundamental understanding of how radiation-induced defects alter mechanical properties. Ion beams create radiation damage efficiently without material activation, but their limited penetration depth requires small-scale testing. However, strength measurements of nano-scale irradiated specimens have not been previously performed. Here we show that yield strengths approaching macroscopic values are measured from irradiated ~400 nm diameter copper specimens. Quantitative in situ nano-compression testing in a transmission electron microscope reveals that the strength of larger samples is controlled by dislocation-irradiation defect interactions, yielding size-independent strengths. Below ~400 nm, size-dependent strength results from dislocation source limitation. This transition length-scale should be universal, but depend on material and irradiation conditions. We conclude that for irradiated copper, and presumably related materials, nano-scale in situ testing can determine bulk-like yield strengths and simultaneously identify deformation mechanisms. 2011-06-26 /pmc/articles/PMC3145148/ /pubmed/21706011 http://dx.doi.org/10.1038/nmat3055 Text en Users may view, print, copy, download and text and data- mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use: http://www.nature.com/authors/editorial_policies/license.html#terms
spellingShingle Article
Kiener, D.
Hosemann, P.
Maloy, S. A.
Minor, A. M.
In situ nano-compression testing of irradiated copper
title In situ nano-compression testing of irradiated copper
title_full In situ nano-compression testing of irradiated copper
title_fullStr In situ nano-compression testing of irradiated copper
title_full_unstemmed In situ nano-compression testing of irradiated copper
title_short In situ nano-compression testing of irradiated copper
title_sort in situ nano-compression testing of irradiated copper
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3145148/
https://www.ncbi.nlm.nih.gov/pubmed/21706011
http://dx.doi.org/10.1038/nmat3055
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