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Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

Shear-induced segregation, by particle size, is known in the flow of colloids and granular media, but is unexpected at the atomic level in the deformation of solid materials, especially at room temperature. In nanoscale wear tests of an Fe-based bulk metallic glass at room temperature, without signi...

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Autores principales: Louzguine-Luzgin, D. V., Trifonov, A. S., Ivanov, Yu. P., Lu, A. K. A., Lubenchenko, A. V., Greer, A. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8249454/
https://www.ncbi.nlm.nih.gov/pubmed/34211030
http://dx.doi.org/10.1038/s41598-021-92907-4
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author Louzguine-Luzgin, D. V.
Trifonov, A. S.
Ivanov, Yu. P.
Lu, A. K. A.
Lubenchenko, A. V.
Greer, A. L.
author_facet Louzguine-Luzgin, D. V.
Trifonov, A. S.
Ivanov, Yu. P.
Lu, A. K. A.
Lubenchenko, A. V.
Greer, A. L.
author_sort Louzguine-Luzgin, D. V.
collection PubMed
description Shear-induced segregation, by particle size, is known in the flow of colloids and granular media, but is unexpected at the atomic level in the deformation of solid materials, especially at room temperature. In nanoscale wear tests of an Fe-based bulk metallic glass at room temperature, without significant surface heating, we find that intense shear localization under a scanned indenter tip can induce strong segregation of a dilute large-atom solute (Y) to planar regions that then crystallize as a Y-rich solid solution. There is stiffening of the material, and the underlying chemical and structural effects are characterized by transmission electron microscopy. The key influence of the soft Fe–Y interatomic interaction is investigated by ab-initio calculation. The driving force for the induced segregation, and its mechanisms, are considered by comparison with effects in other sheared media.
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spelling pubmed-82494542021-07-06 Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature Louzguine-Luzgin, D. V. Trifonov, A. S. Ivanov, Yu. P. Lu, A. K. A. Lubenchenko, A. V. Greer, A. L. Sci Rep Article Shear-induced segregation, by particle size, is known in the flow of colloids and granular media, but is unexpected at the atomic level in the deformation of solid materials, especially at room temperature. In nanoscale wear tests of an Fe-based bulk metallic glass at room temperature, without significant surface heating, we find that intense shear localization under a scanned indenter tip can induce strong segregation of a dilute large-atom solute (Y) to planar regions that then crystallize as a Y-rich solid solution. There is stiffening of the material, and the underlying chemical and structural effects are characterized by transmission electron microscopy. The key influence of the soft Fe–Y interatomic interaction is investigated by ab-initio calculation. The driving force for the induced segregation, and its mechanisms, are considered by comparison with effects in other sheared media. Nature Publishing Group UK 2021-07-01 /pmc/articles/PMC8249454/ /pubmed/34211030 http://dx.doi.org/10.1038/s41598-021-92907-4 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Louzguine-Luzgin, D. V.
Trifonov, A. S.
Ivanov, Yu. P.
Lu, A. K. A.
Lubenchenko, A. V.
Greer, A. L.
Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
title Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
title_full Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
title_fullStr Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
title_full_unstemmed Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
title_short Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
title_sort shear-induced chemical segregation in a fe-based bulk metallic glass at room temperature
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8249454/
https://www.ncbi.nlm.nih.gov/pubmed/34211030
http://dx.doi.org/10.1038/s41598-021-92907-4
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