Hierarchical microstructure strengthening in a single crystal high entropy superalloy

A hierarchical microstructure strengthened high entropy superalloy (HESA) with superior cost specific yield strength from room temperature up to 1,023 K is presented. By phase transformation pathway through metastability, HESA possesses a hierarchical microstructure containing a dispersion of nano s...

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Autores principales: Chen, Yung-Ta, Chang, Yao-Jen, Murakami, Hideyuki, Sasaki, Taisuke, Hono, Kazuhiro, Li, Chen-Wei, Kakehi, Koji, Yeh, Jien-Wei, Yeh, An-Chou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7376180/
https://www.ncbi.nlm.nih.gov/pubmed/32699329
http://dx.doi.org/10.1038/s41598-020-69257-8
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author Chen, Yung-Ta
Chang, Yao-Jen
Murakami, Hideyuki
Sasaki, Taisuke
Hono, Kazuhiro
Li, Chen-Wei
Kakehi, Koji
Yeh, Jien-Wei
Yeh, An-Chou
author_facet Chen, Yung-Ta
Chang, Yao-Jen
Murakami, Hideyuki
Sasaki, Taisuke
Hono, Kazuhiro
Li, Chen-Wei
Kakehi, Koji
Yeh, Jien-Wei
Yeh, An-Chou
author_sort Chen, Yung-Ta
collection PubMed
description A hierarchical microstructure strengthened high entropy superalloy (HESA) with superior cost specific yield strength from room temperature up to 1,023 K is presented. By phase transformation pathway through metastability, HESA possesses a hierarchical microstructure containing a dispersion of nano size disordered FCC particles inside ordered L1(2) precipitates that are within the FCC matrix. The average tensile yield strength of HESA from room temperature to 1,023 K could be 120 MPa higher than that of advanced single crystal superalloy, while HESA could still exhibit an elongation greater than 20%. Furthermore, the cost specific yield strength of HESA can be 8 times that of some superalloys. A template for lighter, stronger, cheaper, and more ductile high temperature alloy is proposed.
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spelling pubmed-73761802020-07-24 Hierarchical microstructure strengthening in a single crystal high entropy superalloy Chen, Yung-Ta Chang, Yao-Jen Murakami, Hideyuki Sasaki, Taisuke Hono, Kazuhiro Li, Chen-Wei Kakehi, Koji Yeh, Jien-Wei Yeh, An-Chou Sci Rep Article A hierarchical microstructure strengthened high entropy superalloy (HESA) with superior cost specific yield strength from room temperature up to 1,023 K is presented. By phase transformation pathway through metastability, HESA possesses a hierarchical microstructure containing a dispersion of nano size disordered FCC particles inside ordered L1(2) precipitates that are within the FCC matrix. The average tensile yield strength of HESA from room temperature to 1,023 K could be 120 MPa higher than that of advanced single crystal superalloy, while HESA could still exhibit an elongation greater than 20%. Furthermore, the cost specific yield strength of HESA can be 8 times that of some superalloys. A template for lighter, stronger, cheaper, and more ductile high temperature alloy is proposed. Nature Publishing Group UK 2020-07-22 /pmc/articles/PMC7376180/ /pubmed/32699329 http://dx.doi.org/10.1038/s41598-020-69257-8 Text en © The Author(s) 2020 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
Chen, Yung-Ta
Chang, Yao-Jen
Murakami, Hideyuki
Sasaki, Taisuke
Hono, Kazuhiro
Li, Chen-Wei
Kakehi, Koji
Yeh, Jien-Wei
Yeh, An-Chou
Hierarchical microstructure strengthening in a single crystal high entropy superalloy
title Hierarchical microstructure strengthening in a single crystal high entropy superalloy
title_full Hierarchical microstructure strengthening in a single crystal high entropy superalloy
title_fullStr Hierarchical microstructure strengthening in a single crystal high entropy superalloy
title_full_unstemmed Hierarchical microstructure strengthening in a single crystal high entropy superalloy
title_short Hierarchical microstructure strengthening in a single crystal high entropy superalloy
title_sort hierarchical microstructure strengthening in a single crystal high entropy superalloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7376180/
https://www.ncbi.nlm.nih.gov/pubmed/32699329
http://dx.doi.org/10.1038/s41598-020-69257-8
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