Atomistic observation of a crack tip approaching coherent twin boundaries

Coherent twin boundaries (CTBs) in nano-twinned materials could improve crack resistance. However, the role of the CTBs during crack penetration has never been explored at atomic scale. Our in situ observation on nano-twinned Ag under a high resolution transmission electron microscope (HRTEM) reveal...

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Autores principales: Liu, L., Wang, J., Gong, S. K., Mao, S. X.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957144/
https://www.ncbi.nlm.nih.gov/pubmed/24637906
http://dx.doi.org/10.1038/srep04397
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author Liu, L.
Wang, J.
Gong, S. K.
Mao, S. X.
author_facet Liu, L.
Wang, J.
Gong, S. K.
Mao, S. X.
author_sort Liu, L.
collection PubMed
description Coherent twin boundaries (CTBs) in nano-twinned materials could improve crack resistance. However, the role of the CTBs during crack penetration has never been explored at atomic scale. Our in situ observation on nano-twinned Ag under a high resolution transmission electron microscope (HRTEM) reveals the dynamic processes of a crack penetration across the CTBs, which involve alternated crack tip blunting, crack deflection, twinning/detwinning and slip transmission across the CTBs. The alternated blunting processes are related to the emission of different types of dislocations at the crack tip and vary with the distance of the crack tip from the CTBs.
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spelling pubmed-39571442014-03-21 Atomistic observation of a crack tip approaching coherent twin boundaries Liu, L. Wang, J. Gong, S. K. Mao, S. X. Sci Rep Article Coherent twin boundaries (CTBs) in nano-twinned materials could improve crack resistance. However, the role of the CTBs during crack penetration has never been explored at atomic scale. Our in situ observation on nano-twinned Ag under a high resolution transmission electron microscope (HRTEM) reveals the dynamic processes of a crack penetration across the CTBs, which involve alternated crack tip blunting, crack deflection, twinning/detwinning and slip transmission across the CTBs. The alternated blunting processes are related to the emission of different types of dislocations at the crack tip and vary with the distance of the crack tip from the CTBs. Nature Publishing Group 2014-03-18 /pmc/articles/PMC3957144/ /pubmed/24637906 http://dx.doi.org/10.1038/srep04397 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareALike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Article
Liu, L.
Wang, J.
Gong, S. K.
Mao, S. X.
Atomistic observation of a crack tip approaching coherent twin boundaries
title Atomistic observation of a crack tip approaching coherent twin boundaries
title_full Atomistic observation of a crack tip approaching coherent twin boundaries
title_fullStr Atomistic observation of a crack tip approaching coherent twin boundaries
title_full_unstemmed Atomistic observation of a crack tip approaching coherent twin boundaries
title_short Atomistic observation of a crack tip approaching coherent twin boundaries
title_sort atomistic observation of a crack tip approaching coherent twin boundaries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957144/
https://www.ncbi.nlm.nih.gov/pubmed/24637906
http://dx.doi.org/10.1038/srep04397
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