Extremely high strength and work hardening ability in a metastable high entropy alloy

Abstract 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 Fe42Mn28Co10Cr15Si5 high entropy alloy (DP-5Si-HEA) exhibiting ve...

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Autores principales:	S. S. Nene, M. Frank, K. Liu, R. S. Mishra, B. A. McWilliams, K. C. Cho
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/197a4fc27a874c92bd8354146922863b
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spelling	oai:doaj.org-article:197a4fc27a874c92bd8354146922863b2021-12-02T15:08:16ZExtremely high strength and work hardening ability in a metastable high entropy alloy10.1038/s41598-018-28383-02045-2322https://doaj.org/article/197a4fc27a874c92bd8354146922863b2018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-28383-0https://doaj.org/toc/2045-2322Abstract 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 Fe42Mn28Co10Cr15Si5 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.S. S. NeneM. FrankK. LiuR. S. MishraB. A. McWilliamsK. C. ChoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. S. Nene M. Frank K. Liu R. S. Mishra B. A. McWilliams K. C. Cho Extremely high strength and work hardening ability in a metastable high entropy alloy
description	Abstract 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 Fe42Mn28Co10Cr15Si5 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	article
author	S. S. Nene M. Frank K. Liu R. S. Mishra B. A. McWilliams K. C. Cho
author_facet	S. S. Nene M. Frank K. Liu R. S. Mishra B. A. McWilliams K. C. Cho
author_sort	S. S. Nene
title	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_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_sort	extremely high strength and work hardening ability in a metastable high entropy alloy
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/197a4fc27a874c92bd8354146922863b
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Extremely high strength and work hardening ability in a metastable high entropy alloy

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