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Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study

The paper studies the mechanisms of plastic relaxation and mechanical response depending on the concentration of Cu atoms at grain boundaries (GBs) in nanocrystalline aluminum with molecular dynamics simulations. A nonmonotonic dependence of the critical resolved shear stress on the Cu content at GB...

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Detalles Bibliográficos
Autores principales: Krasnikov, Vasiliy, Mayer, Alexander, Bezborodova, Polina, Gazizov, Marat
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10146141/
https://www.ncbi.nlm.nih.gov/pubmed/37109927
http://dx.doi.org/10.3390/ma16083091
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author Krasnikov, Vasiliy
Mayer, Alexander
Bezborodova, Polina
Gazizov, Marat
author_facet Krasnikov, Vasiliy
Mayer, Alexander
Bezborodova, Polina
Gazizov, Marat
author_sort Krasnikov, Vasiliy
collection PubMed
description The paper studies the mechanisms of plastic relaxation and mechanical response depending on the concentration of Cu atoms at grain boundaries (GBs) in nanocrystalline aluminum with molecular dynamics simulations. A nonmonotonic dependence of the critical resolved shear stress on the Cu content at GBs is shown. This nonmonotonic dependence is related to the change in plastic relaxation mechanisms at GBs. At a low Cu content, GBs slip as dislocation walls, whereas an increase in Cu content involves a dislocation emission from GBs and grain rotation with GB sliding.
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spelling pubmed-101461412023-04-29 Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study Krasnikov, Vasiliy Mayer, Alexander Bezborodova, Polina Gazizov, Marat Materials (Basel) Article The paper studies the mechanisms of plastic relaxation and mechanical response depending on the concentration of Cu atoms at grain boundaries (GBs) in nanocrystalline aluminum with molecular dynamics simulations. A nonmonotonic dependence of the critical resolved shear stress on the Cu content at GBs is shown. This nonmonotonic dependence is related to the change in plastic relaxation mechanisms at GBs. At a low Cu content, GBs slip as dislocation walls, whereas an increase in Cu content involves a dislocation emission from GBs and grain rotation with GB sliding. MDPI 2023-04-13 /pmc/articles/PMC10146141/ /pubmed/37109927 http://dx.doi.org/10.3390/ma16083091 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Krasnikov, Vasiliy
Mayer, Alexander
Bezborodova, Polina
Gazizov, Marat
Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study
title Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study
title_full Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study
title_fullStr Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study
title_full_unstemmed Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study
title_short Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study
title_sort effect of copper segregation at low-angle grain boundaries on the mechanisms of plastic relaxation in nanocrystalline aluminum: an atomistic study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10146141/
https://www.ncbi.nlm.nih.gov/pubmed/37109927
http://dx.doi.org/10.3390/ma16083091
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