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

Abstract 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, with...

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Autores principales:	D. V. Louzguine-Luzgin, A. S. Trifonov, Yu. P. Ivanov, A. K. A. Lu, A. V. Lubenchenko, A. L. Greer
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/14505648e19e4fcf8b2c7abd84b8e6f0
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spelling	oai:doaj.org-article:14505648e19e4fcf8b2c7abd84b8e6f02021-12-02T18:18:44ZShear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature10.1038/s41598-021-92907-42045-2322https://doaj.org/article/14505648e19e4fcf8b2c7abd84b8e6f02021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92907-4https://doaj.org/toc/2045-2322Abstract 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.D. V. Louzguine-LuzginA. S. TrifonovYu. P. IvanovA. K. A. LuA. V. LubenchenkoA. L. GreerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q D. V. Louzguine-Luzgin A. S. Trifonov Yu. P. Ivanov A. K. A. Lu A. V. Lubenchenko A. L. Greer Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature
description	Abstract 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.
format	article
author	D. V. Louzguine-Luzgin A. S. Trifonov Yu. P. Ivanov A. K. A. Lu A. V. Lubenchenko A. L. Greer
author_facet	D. V. Louzguine-Luzgin A. S. Trifonov Yu. P. Ivanov A. K. A. Lu A. V. Lubenchenko A. L. Greer
author_sort	D. V. Louzguine-Luzgin
title	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_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_sort	shear-induced chemical segregation in a fe-based bulk metallic glass at room temperature
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/14505648e19e4fcf8b2c7abd84b8e6f0
work_keys_str_mv	AT dvlouzguineluzgin shearinducedchemicalsegregationinafebasedbulkmetallicglassatroomtemperature AT astrifonov shearinducedchemicalsegregationinafebasedbulkmetallicglassatroomtemperature AT yupivanov shearinducedchemicalsegregationinafebasedbulkmetallicglassatroomtemperature AT akalu shearinducedchemicalsegregationinafebasedbulkmetallicglassatroomtemperature AT avlubenchenko shearinducedchemicalsegregationinafebasedbulkmetallicglassatroomtemperature AT algreer shearinducedchemicalsegregationinafebasedbulkmetallicglassatroomtemperature
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Shear-induced chemical segregation in a Fe-based bulk metallic glass at room temperature

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