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Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy
Coherent B2-ordered NiAl-type precipitates have been used to reinforce solid-solution body-centered-cubic iron for high-temperature application in fossil-energy power plants. In this study, we investigate the stability of nano-sized precipitates in a NiAl-strengthened ferritic alloy at 700–950 °C us...
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/PMC4633603/ https://www.ncbi.nlm.nih.gov/pubmed/26537060 http://dx.doi.org/10.1038/srep16081 |
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author | Sun, Zhiqian Song, Gian Ilavsky, Jan Ghosh, Gautam Liaw, Peter K. |
author_facet | Sun, Zhiqian Song, Gian Ilavsky, Jan Ghosh, Gautam Liaw, Peter K. |
author_sort | Sun, Zhiqian |
collection | PubMed |
description | Coherent B2-ordered NiAl-type precipitates have been used to reinforce solid-solution body-centered-cubic iron for high-temperature application in fossil-energy power plants. In this study, we investigate the stability of nano-sized precipitates in a NiAl-strengthened ferritic alloy at 700–950 °C using ultra-small angle X-ray scattering and electron microscopies. Here we show that the coarsening kinetics of NiAl-type precipitates is in excellent agreement with the ripening model in multicomponent alloys. We further demonstrate that the interfacial energy between the matrix and NiAl-type precipitates is strongly dependent on differences in the matrix/precipitate compositions. Our results profile the ripening process in multicomponent alloys by illustrating controlling factors of interfacial energy, diffusivities, and element partitioning. The study provides guidelines to design and develop high-temperature alloys with stable microstructures for long-term service. |
format | Online Article Text |
id | pubmed-4633603 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46336032015-11-05 Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy Sun, Zhiqian Song, Gian Ilavsky, Jan Ghosh, Gautam Liaw, Peter K. Sci Rep Article Coherent B2-ordered NiAl-type precipitates have been used to reinforce solid-solution body-centered-cubic iron for high-temperature application in fossil-energy power plants. In this study, we investigate the stability of nano-sized precipitates in a NiAl-strengthened ferritic alloy at 700–950 °C using ultra-small angle X-ray scattering and electron microscopies. Here we show that the coarsening kinetics of NiAl-type precipitates is in excellent agreement with the ripening model in multicomponent alloys. We further demonstrate that the interfacial energy between the matrix and NiAl-type precipitates is strongly dependent on differences in the matrix/precipitate compositions. Our results profile the ripening process in multicomponent alloys by illustrating controlling factors of interfacial energy, diffusivities, and element partitioning. The study provides guidelines to design and develop high-temperature alloys with stable microstructures for long-term service. Nature Publishing Group 2015-11-05 /pmc/articles/PMC4633603/ /pubmed/26537060 http://dx.doi.org/10.1038/srep16081 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 Sun, Zhiqian Song, Gian Ilavsky, Jan Ghosh, Gautam Liaw, Peter K. Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy |
title | Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy |
title_full | Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy |
title_fullStr | Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy |
title_full_unstemmed | Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy |
title_short | Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy |
title_sort | nano-sized precipitate stability and its controlling factors in a nial-strengthened ferritic alloy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4633603/ https://www.ncbi.nlm.nih.gov/pubmed/26537060 http://dx.doi.org/10.1038/srep16081 |
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