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A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys
High-entropy alloys (HEAs) can have either high strength or high ductility, and a simultaneous achievement of both still constitutes a tough challenge. The inferior castability and compositional segregation of HEAs are also obstacles for their technological applications. To tackle these problems, he...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4145285/ https://www.ncbi.nlm.nih.gov/pubmed/25160691 http://dx.doi.org/10.1038/srep06200 |
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author | Lu, Yiping Dong, Yong Guo, Sheng Jiang, Li Kang, Huijun Wang, Tongmin Wen, Bin Wang, Zhijun Jie, Jinchuan Cao, Zhiqiang Ruan, Haihui Li, Tingju |
author_facet | Lu, Yiping Dong, Yong Guo, Sheng Jiang, Li Kang, Huijun Wang, Tongmin Wen, Bin Wang, Zhijun Jie, Jinchuan Cao, Zhiqiang Ruan, Haihui Li, Tingju |
author_sort | Lu, Yiping |
collection | PubMed |
description | High-entropy alloys (HEAs) can have either high strength or high ductility, and a simultaneous achievement of both still constitutes a tough challenge. The inferior castability and compositional segregation of HEAs are also obstacles for their technological applications. To tackle these problems, here we proposed a novel strategy to design HEAs using the eutectic alloy concept, i.e. to achieve a microstructure composed of alternating soft fcc and hard bcc phases. As a manifestation of this concept, an AlCoCrFeNi(2.1) (atomic portion) eutectic high-entropy alloy (EHEA) was designed. The as-cast EHEA possessed a fine lamellar fcc/B2 microstructure, and showed an unprecedented combination of high tensile ductility and high fracture strength at room temperature. The excellent mechanical properties could be kept up to 700°C. This new alloy design strategy can be readily adapted to large-scale industrial production of HEAs with simultaneous high fracture strength and high ductility. |
format | Online Article Text |
id | pubmed-4145285 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-41452852014-09-02 A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys Lu, Yiping Dong, Yong Guo, Sheng Jiang, Li Kang, Huijun Wang, Tongmin Wen, Bin Wang, Zhijun Jie, Jinchuan Cao, Zhiqiang Ruan, Haihui Li, Tingju Sci Rep Article High-entropy alloys (HEAs) can have either high strength or high ductility, and a simultaneous achievement of both still constitutes a tough challenge. The inferior castability and compositional segregation of HEAs are also obstacles for their technological applications. To tackle these problems, here we proposed a novel strategy to design HEAs using the eutectic alloy concept, i.e. to achieve a microstructure composed of alternating soft fcc and hard bcc phases. As a manifestation of this concept, an AlCoCrFeNi(2.1) (atomic portion) eutectic high-entropy alloy (EHEA) was designed. The as-cast EHEA possessed a fine lamellar fcc/B2 microstructure, and showed an unprecedented combination of high tensile ductility and high fracture strength at room temperature. The excellent mechanical properties could be kept up to 700°C. This new alloy design strategy can be readily adapted to large-scale industrial production of HEAs with simultaneous high fracture strength and high ductility. Nature Publishing Group 2014-08-27 /pmc/articles/PMC4145285/ /pubmed/25160691 http://dx.doi.org/10.1038/srep06200 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ |
spellingShingle | Article Lu, Yiping Dong, Yong Guo, Sheng Jiang, Li Kang, Huijun Wang, Tongmin Wen, Bin Wang, Zhijun Jie, Jinchuan Cao, Zhiqiang Ruan, Haihui Li, Tingju A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys |
title | A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys |
title_full | A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys |
title_fullStr | A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys |
title_full_unstemmed | A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys |
title_short | A Promising New Class of High-Temperature Alloys: Eutectic High-Entropy Alloys |
title_sort | promising new class of high-temperature alloys: eutectic high-entropy alloys |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4145285/ https://www.ncbi.nlm.nih.gov/pubmed/25160691 http://dx.doi.org/10.1038/srep06200 |
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