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Ultrastrong nanotwinned pure nickel with extremely fine twin thickness

The strength of nanocrystalline and nanotwinned metals stops increasing or even starts decreasing when their grain size or twin thickness is below a critical size—a phenomenon known as Hall-Petch breakdown—which hinders the attainment of ultrahigh strength. Here, we report continuous strengthening i...

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Autores principales: Duan, Fenghui, Lin, Yan, Pan, Jie, Zhao, Lei, Guo, Qiang, Zhang, Di, Li, Yi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8245049/
https://www.ncbi.nlm.nih.gov/pubmed/34193428
http://dx.doi.org/10.1126/sciadv.abg5113
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author Duan, Fenghui
Lin, Yan
Pan, Jie
Zhao, Lei
Guo, Qiang
Zhang, Di
Li, Yi
author_facet Duan, Fenghui
Lin, Yan
Pan, Jie
Zhao, Lei
Guo, Qiang
Zhang, Di
Li, Yi
author_sort Duan, Fenghui
collection PubMed
description The strength of nanocrystalline and nanotwinned metals stops increasing or even starts decreasing when their grain size or twin thickness is below a critical size—a phenomenon known as Hall-Petch breakdown—which hinders the attainment of ultrahigh strength. Here, we report continuous strengthening in nanotwinned pure Ni with twin thicknesses ranging from 81.0 to 2.9 nm. An unprecedented strength of 4.0 GPa was achieved at extremely fine twin thickness of 2.9 nm, which is about 12 times stronger than that of conventional coarse-grained nickel. This ultrahigh strength arises from the excellent stability of twin boundaries and their strong impedance to dislocation motion. In particular, we find that secondary nanotwins are activated to sustain plastic deformation, which also contribute to the high strength. These results not only advance the understanding of the strengthening mechanisms in nanotwinned metals but also offer an alternative pathway to develop engineering materials with ultrahigh strength.
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spelling pubmed-82450492021-07-13 Ultrastrong nanotwinned pure nickel with extremely fine twin thickness Duan, Fenghui Lin, Yan Pan, Jie Zhao, Lei Guo, Qiang Zhang, Di Li, Yi Sci Adv Research Articles The strength of nanocrystalline and nanotwinned metals stops increasing or even starts decreasing when their grain size or twin thickness is below a critical size—a phenomenon known as Hall-Petch breakdown—which hinders the attainment of ultrahigh strength. Here, we report continuous strengthening in nanotwinned pure Ni with twin thicknesses ranging from 81.0 to 2.9 nm. An unprecedented strength of 4.0 GPa was achieved at extremely fine twin thickness of 2.9 nm, which is about 12 times stronger than that of conventional coarse-grained nickel. This ultrahigh strength arises from the excellent stability of twin boundaries and their strong impedance to dislocation motion. In particular, we find that secondary nanotwins are activated to sustain plastic deformation, which also contribute to the high strength. These results not only advance the understanding of the strengthening mechanisms in nanotwinned metals but also offer an alternative pathway to develop engineering materials with ultrahigh strength. American Association for the Advancement of Science 2021-06-30 /pmc/articles/PMC8245049/ /pubmed/34193428 http://dx.doi.org/10.1126/sciadv.abg5113 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Duan, Fenghui
Lin, Yan
Pan, Jie
Zhao, Lei
Guo, Qiang
Zhang, Di
Li, Yi
Ultrastrong nanotwinned pure nickel with extremely fine twin thickness
title Ultrastrong nanotwinned pure nickel with extremely fine twin thickness
title_full Ultrastrong nanotwinned pure nickel with extremely fine twin thickness
title_fullStr Ultrastrong nanotwinned pure nickel with extremely fine twin thickness
title_full_unstemmed Ultrastrong nanotwinned pure nickel with extremely fine twin thickness
title_short Ultrastrong nanotwinned pure nickel with extremely fine twin thickness
title_sort ultrastrong nanotwinned pure nickel with extremely fine twin thickness
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8245049/
https://www.ncbi.nlm.nih.gov/pubmed/34193428
http://dx.doi.org/10.1126/sciadv.abg5113
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