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Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel

The precipitation and growth mechanism of the Laves phase and the coarsening behaviors of Laves phase, M23C6 and MX carbonitrides have been emphatically investigated in P91 steel at 625 °C under different aging conditions. After long-term aging at 625 °C (>1500 h), it was observed that the Laves...

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Autores principales: Zhao, Hongchang, Wang, Zixi, Han, Xi, Wang, Mingjia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030032/
https://www.ncbi.nlm.nih.gov/pubmed/35454540
http://dx.doi.org/10.3390/ma15082847
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author Zhao, Hongchang
Wang, Zixi
Han, Xi
Wang, Mingjia
author_facet Zhao, Hongchang
Wang, Zixi
Han, Xi
Wang, Mingjia
author_sort Zhao, Hongchang
collection PubMed
description The precipitation and growth mechanism of the Laves phase and the coarsening behaviors of Laves phase, M23C6 and MX carbonitrides have been emphatically investigated in P91 steel at 625 °C under different aging conditions. After long-term aging at 625 °C (>1500 h), it was observed that the Laves phase grew rapidly in the region near the M23C6 carbide once precipitated, and further gradually completed the engulfment process until the M23C6 carbide particles disappeared. Furthermore, a new crystallographic orientation relationship between M23C6 carbides and Laves phase has been observed at 625 °C for 5000 h, which is {0001}(Laves)∥{111}(M23C6), <11 [Formula: see text] 1>(Laves)∥ <011>(M23C6). The coarsening behaviors of Laves phase, M23C6 carbides and MX carbonitrides have been emphatically investigated, conforming to the existing ripening model of multicomponent alloys. The coarsening rates for the Laves phase, M23C6 and MX have values of ~32.2 (≥5000 h), 5.3 and 0.6 nm/h(1/)(3), respectively.
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spelling pubmed-90300322022-04-23 Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel Zhao, Hongchang Wang, Zixi Han, Xi Wang, Mingjia Materials (Basel) Article The precipitation and growth mechanism of the Laves phase and the coarsening behaviors of Laves phase, M23C6 and MX carbonitrides have been emphatically investigated in P91 steel at 625 °C under different aging conditions. After long-term aging at 625 °C (>1500 h), it was observed that the Laves phase grew rapidly in the region near the M23C6 carbide once precipitated, and further gradually completed the engulfment process until the M23C6 carbide particles disappeared. Furthermore, a new crystallographic orientation relationship between M23C6 carbides and Laves phase has been observed at 625 °C for 5000 h, which is {0001}(Laves)∥{111}(M23C6), <11 [Formula: see text] 1>(Laves)∥ <011>(M23C6). The coarsening behaviors of Laves phase, M23C6 carbides and MX carbonitrides have been emphatically investigated, conforming to the existing ripening model of multicomponent alloys. The coarsening rates for the Laves phase, M23C6 and MX have values of ~32.2 (≥5000 h), 5.3 and 0.6 nm/h(1/)(3), respectively. MDPI 2022-04-13 /pmc/articles/PMC9030032/ /pubmed/35454540 http://dx.doi.org/10.3390/ma15082847 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Hongchang
Wang, Zixi
Han, Xi
Wang, Mingjia
Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel
title Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel
title_full Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel
title_fullStr Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel
title_full_unstemmed Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel
title_short Effect of Long-Term Aging on the Microstructural Evolution in a P91 Steel
title_sort effect of long-term aging on the microstructural evolution in a p91 steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030032/
https://www.ncbi.nlm.nih.gov/pubmed/35454540
http://dx.doi.org/10.3390/ma15082847
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