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High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering

Recently, high-entropy alloy thin films (HEATFs) with nanocrystalline structures and high hardness were developed by magnetron sputtering technique and have exciting potential to make small structure devices and precision instruments with sizes ranging from nanometers to micrometers. However, the st...

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Autores principales: Liao, Wei-Bing, Zhang, Hongti, Liu, Zhi-Yuan, Li, Pei-Feng, Huang, Jian-Jun, Yu, Chun-Yan, Lu, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7514628/
https://www.ncbi.nlm.nih.gov/pubmed/33266862
http://dx.doi.org/10.3390/e21020146
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author Liao, Wei-Bing
Zhang, Hongti
Liu, Zhi-Yuan
Li, Pei-Feng
Huang, Jian-Jun
Yu, Chun-Yan
Lu, Yang
author_facet Liao, Wei-Bing
Zhang, Hongti
Liu, Zhi-Yuan
Li, Pei-Feng
Huang, Jian-Jun
Yu, Chun-Yan
Lu, Yang
author_sort Liao, Wei-Bing
collection PubMed
description Recently, high-entropy alloy thin films (HEATFs) with nanocrystalline structures and high hardness were developed by magnetron sputtering technique and have exciting potential to make small structure devices and precision instruments with sizes ranging from nanometers to micrometers. However, the strength and deformation mechanisms are still unclear. In this work, nanocrystalline Al(0.3)CoCrFeNi HEATFs with a thickness of ~4 μm were prepared. The microstructures of the thin films were comprehensively characterized, and the mechanical properties were systematically studied. It was found that the thin film was smooth, with a roughness of less than 5 nm. The chemical composition of the high entropy alloy thin film was homogeneous with a main single face-centered cubic (FCC) structure. Furthermore, it was observed that the hardness and the yield strength of the high-entropy alloy thin film was about three times that of the bulk samples, and the plastic deformation was inhomogeneous. Our results could provide an in-depth understanding of the mechanics and deformation mechanism for future design of nanocrystalline HEATFs with desired properties.
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spelling pubmed-75146282020-11-09 High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering Liao, Wei-Bing Zhang, Hongti Liu, Zhi-Yuan Li, Pei-Feng Huang, Jian-Jun Yu, Chun-Yan Lu, Yang Entropy (Basel) Article Recently, high-entropy alloy thin films (HEATFs) with nanocrystalline structures and high hardness were developed by magnetron sputtering technique and have exciting potential to make small structure devices and precision instruments with sizes ranging from nanometers to micrometers. However, the strength and deformation mechanisms are still unclear. In this work, nanocrystalline Al(0.3)CoCrFeNi HEATFs with a thickness of ~4 μm were prepared. The microstructures of the thin films were comprehensively characterized, and the mechanical properties were systematically studied. It was found that the thin film was smooth, with a roughness of less than 5 nm. The chemical composition of the high entropy alloy thin film was homogeneous with a main single face-centered cubic (FCC) structure. Furthermore, it was observed that the hardness and the yield strength of the high-entropy alloy thin film was about three times that of the bulk samples, and the plastic deformation was inhomogeneous. Our results could provide an in-depth understanding of the mechanics and deformation mechanism for future design of nanocrystalline HEATFs with desired properties. MDPI 2019-02-04 /pmc/articles/PMC7514628/ /pubmed/33266862 http://dx.doi.org/10.3390/e21020146 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liao, Wei-Bing
Zhang, Hongti
Liu, Zhi-Yuan
Li, Pei-Feng
Huang, Jian-Jun
Yu, Chun-Yan
Lu, Yang
High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering
title High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering
title_full High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering
title_fullStr High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering
title_full_unstemmed High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering
title_short High Strength and Deformation Mechanisms of Al(0.3)CoCrFeNi High-Entropy Alloy Thin Films Fabricated by Magnetron Sputtering
title_sort high strength and deformation mechanisms of al(0.3)cocrfeni high-entropy alloy thin films fabricated by magnetron sputtering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7514628/
https://www.ncbi.nlm.nih.gov/pubmed/33266862
http://dx.doi.org/10.3390/e21020146
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