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Extremely high strength and work hardening ability in a metastable high entropy alloy
Design of multi-phase high entropy alloys uses metastability of phases to tune the strain accommodation by favoring transformation and/or twinning during deformation. Inspired by this, here we present Si containing dual phase Fe(42)Mn(28)Co(10)Cr(15)Si(5) high entropy alloy (DP-5Si-HEA) exhibiting v...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6028623/ https://www.ncbi.nlm.nih.gov/pubmed/29967441 http://dx.doi.org/10.1038/s41598-018-28383-0 |
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author | Nene, S. S. Frank, M. Liu, K. Mishra, R. S. McWilliams, B. A. Cho, K. C. |
author_facet | Nene, S. S. Frank, M. Liu, K. Mishra, R. S. McWilliams, B. A. Cho, K. C. |
author_sort | Nene, S. S. |
collection | PubMed |
description | Design of multi-phase high entropy alloys uses metastability of phases to tune the strain accommodation by favoring transformation and/or twinning during deformation. Inspired by this, here we present Si containing dual phase Fe(42)Mn(28)Co(10)Cr(15)Si(5) high entropy alloy (DP-5Si-HEA) exhibiting very high strength (1.15 GPa) and work hardening (WH) ability. The addition of Si in DP-5Si-HEA decreased the stability of f.c.c. (γ) matrix thereby promoting pronounced transformation induced plastic deformation in both as-cast and grain refined DP-5Si-HEAs. Higher yet sustained WH ability in fine grained DP-5Si-HEA is associated with the uniform strain partitioning among the metastable γ phase and resultant h.c.p. (ε) phase thereby resulting in total elongation of 12%. Hence, design of dual phase HEAs for improved strength and work hardenability can be attained by tuning the metastability of γ matrix through proper choice of alloy chemistry from the abundant compositional space of HEAs. |
format | Online Article Text |
id | pubmed-6028623 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-60286232018-07-09 Extremely high strength and work hardening ability in a metastable high entropy alloy Nene, S. S. Frank, M. Liu, K. Mishra, R. S. McWilliams, B. A. Cho, K. C. Sci Rep Article Design of multi-phase high entropy alloys uses metastability of phases to tune the strain accommodation by favoring transformation and/or twinning during deformation. Inspired by this, here we present Si containing dual phase Fe(42)Mn(28)Co(10)Cr(15)Si(5) high entropy alloy (DP-5Si-HEA) exhibiting very high strength (1.15 GPa) and work hardening (WH) ability. The addition of Si in DP-5Si-HEA decreased the stability of f.c.c. (γ) matrix thereby promoting pronounced transformation induced plastic deformation in both as-cast and grain refined DP-5Si-HEAs. Higher yet sustained WH ability in fine grained DP-5Si-HEA is associated with the uniform strain partitioning among the metastable γ phase and resultant h.c.p. (ε) phase thereby resulting in total elongation of 12%. Hence, design of dual phase HEAs for improved strength and work hardenability can be attained by tuning the metastability of γ matrix through proper choice of alloy chemistry from the abundant compositional space of HEAs. Nature Publishing Group UK 2018-07-02 /pmc/articles/PMC6028623/ /pubmed/29967441 http://dx.doi.org/10.1038/s41598-018-28383-0 Text en © The Author(s) 2018 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Nene, S. S. Frank, M. Liu, K. Mishra, R. S. McWilliams, B. A. Cho, K. C. Extremely high strength and work hardening ability in a metastable high entropy alloy |
title | Extremely high strength and work hardening ability in a metastable high entropy alloy |
title_full | Extremely high strength and work hardening ability in a metastable high entropy alloy |
title_fullStr | Extremely high strength and work hardening ability in a metastable high entropy alloy |
title_full_unstemmed | Extremely high strength and work hardening ability in a metastable high entropy alloy |
title_short | Extremely high strength and work hardening ability in a metastable high entropy alloy |
title_sort | extremely high strength and work hardening ability in a metastable high entropy alloy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6028623/ https://www.ncbi.nlm.nih.gov/pubmed/29967441 http://dx.doi.org/10.1038/s41598-018-28383-0 |
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