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Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates
There have been numerous efforts to develop creep-resistant materials strengthened by incoherent particles at high temperatures and stresses in response to future energy needs for steam turbines in thermal-power plants. However, the microstructural instability of the incoherent-particle-strengthened...
Autores principales: | , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4637877/ https://www.ncbi.nlm.nih.gov/pubmed/26548303 http://dx.doi.org/10.1038/srep16327 |
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author | Song, Gian Sun, Zhiqian Li, Lin Xu, Xiandong Rawlings, Michael Liebscher, Christian H. Clausen, Bjørn Poplawsky, Jonathan Leonard, Donovan N. Huang, Shenyan Teng, Zhenke Liu, Chain T. Asta, Mark D. Gao, Yanfei Dunand, David C. Ghosh, Gautam Chen, Mingwei Fine, Morris E. Liaw, Peter K. |
author_facet | Song, Gian Sun, Zhiqian Li, Lin Xu, Xiandong Rawlings, Michael Liebscher, Christian H. Clausen, Bjørn Poplawsky, Jonathan Leonard, Donovan N. Huang, Shenyan Teng, Zhenke Liu, Chain T. Asta, Mark D. Gao, Yanfei Dunand, David C. Ghosh, Gautam Chen, Mingwei Fine, Morris E. Liaw, Peter K. |
author_sort | Song, Gian |
collection | PubMed |
description | There have been numerous efforts to develop creep-resistant materials strengthened by incoherent particles at high temperatures and stresses in response to future energy needs for steam turbines in thermal-power plants. However, the microstructural instability of the incoherent-particle-strengthened ferritic steels limits their application to temperatures below 900 K. Here, we report a novel ferritic alloy with the excellent creep resistance enhanced by coherent hierarchical precipitates, using the integrated experimental (transmission-electron microscopy/scanning-transmission-electron microscopy, in-situ neutron diffraction, and atom-probe tomography) and theoretical (crystal-plasticity finite-element modeling) approaches. This alloy is strengthened by nano-scaled L2(1)-Ni(2)TiAl (Heusler phase)-based precipitates, which themselves contain coherent nano-scaled B2 zones. These coherent hierarchical precipitates are uniformly distributed within the Fe matrix. Our hierarchical structure material exhibits the superior creep resistance at 973 K in terms of the minimal creep rate, which is four orders of magnitude lower than that of conventional ferritic steels. These results provide a new alloy-design strategy using the novel concept of hierarchical precipitates and the fundamental science for developing creep-resistant ferritic alloys. The present research will broaden the applications of ferritic alloys to higher temperatures. |
format | Online Article Text |
id | pubmed-4637877 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46378772015-11-30 Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates Song, Gian Sun, Zhiqian Li, Lin Xu, Xiandong Rawlings, Michael Liebscher, Christian H. Clausen, Bjørn Poplawsky, Jonathan Leonard, Donovan N. Huang, Shenyan Teng, Zhenke Liu, Chain T. Asta, Mark D. Gao, Yanfei Dunand, David C. Ghosh, Gautam Chen, Mingwei Fine, Morris E. Liaw, Peter K. Sci Rep Article There have been numerous efforts to develop creep-resistant materials strengthened by incoherent particles at high temperatures and stresses in response to future energy needs for steam turbines in thermal-power plants. However, the microstructural instability of the incoherent-particle-strengthened ferritic steels limits their application to temperatures below 900 K. Here, we report a novel ferritic alloy with the excellent creep resistance enhanced by coherent hierarchical precipitates, using the integrated experimental (transmission-electron microscopy/scanning-transmission-electron microscopy, in-situ neutron diffraction, and atom-probe tomography) and theoretical (crystal-plasticity finite-element modeling) approaches. This alloy is strengthened by nano-scaled L2(1)-Ni(2)TiAl (Heusler phase)-based precipitates, which themselves contain coherent nano-scaled B2 zones. These coherent hierarchical precipitates are uniformly distributed within the Fe matrix. Our hierarchical structure material exhibits the superior creep resistance at 973 K in terms of the minimal creep rate, which is four orders of magnitude lower than that of conventional ferritic steels. These results provide a new alloy-design strategy using the novel concept of hierarchical precipitates and the fundamental science for developing creep-resistant ferritic alloys. The present research will broaden the applications of ferritic alloys to higher temperatures. Nature Publishing Group 2015-11-09 /pmc/articles/PMC4637877/ /pubmed/26548303 http://dx.doi.org/10.1038/srep16327 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 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 to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Song, Gian Sun, Zhiqian Li, Lin Xu, Xiandong Rawlings, Michael Liebscher, Christian H. Clausen, Bjørn Poplawsky, Jonathan Leonard, Donovan N. Huang, Shenyan Teng, Zhenke Liu, Chain T. Asta, Mark D. Gao, Yanfei Dunand, David C. Ghosh, Gautam Chen, Mingwei Fine, Morris E. Liaw, Peter K. Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates |
title | Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates |
title_full | Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates |
title_fullStr | Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates |
title_full_unstemmed | Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates |
title_short | Ferritic Alloys with Extreme Creep Resistance via Coherent Hierarchical Precipitates |
title_sort | ferritic alloys with extreme creep resistance via coherent hierarchical precipitates |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4637877/ https://www.ncbi.nlm.nih.gov/pubmed/26548303 http://dx.doi.org/10.1038/srep16327 |
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