Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging

Abstract The precipitates obtained by EPE technology from the 9Cr-1.7W-0.4Mo-Co ferritic heat-resistant steel subject to isothermal aging were investigated using SEM, TEM and XRD. The particle size distribution and the coarsening kinetics of M23C6 with duration of isothermal aging were also analyzed...

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Autores principales:	Qiuzhi Gao, Yanan Zhang, Hailian Zhang, Huijun Li, Fu Qu, Jian Han, Cheng Lu, Bintao Wu, Yao Lu, Yan Ma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d6d611a412fe4c8cb8509e97d7ed1d21
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spelling	oai:doaj.org-article:d6d611a412fe4c8cb8509e97d7ed1d212021-12-02T12:32:01ZPrecipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging10.1038/s41598-017-06191-22045-2322https://doaj.org/article/d6d611a412fe4c8cb8509e97d7ed1d212017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06191-2https://doaj.org/toc/2045-2322Abstract The precipitates obtained by EPE technology from the 9Cr-1.7W-0.4Mo-Co ferritic heat-resistant steel subject to isothermal aging were investigated using SEM, TEM and XRD. The particle size distribution and the coarsening kinetics of M23C6 with duration of isothermal aging were also analyzed with or without consideration of Laves phase. The results show that the isolated dislocations were detected in delta ferrite interior, and the precipitates on delta ferrite and martensite boundaries are obviously larger than other locations. Fe2W-Laves phase can only be found as duration of aging time to 2000 h, and is preferential to form adjacent to M23C6 particles. The small M23C6 particles firstly coarsen, but the large M23C6 are relatively stable during short aging. The total coarsening rate of M23C6 precipitates is 9.75 × 10−28m3s−1, and the coarsening of M23C6 depends on the formation of Laves phase.Qiuzhi GaoYanan ZhangHailian ZhangHuijun LiFu QuJian HanCheng LuBintao WuYao LuYan MaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qiuzhi Gao Yanan Zhang Hailian Zhang Huijun Li Fu Qu Jian Han Cheng Lu Bintao Wu Yao Lu Yan Ma Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
description	Abstract The precipitates obtained by EPE technology from the 9Cr-1.7W-0.4Mo-Co ferritic heat-resistant steel subject to isothermal aging were investigated using SEM, TEM and XRD. The particle size distribution and the coarsening kinetics of M23C6 with duration of isothermal aging were also analyzed with or without consideration of Laves phase. The results show that the isolated dislocations were detected in delta ferrite interior, and the precipitates on delta ferrite and martensite boundaries are obviously larger than other locations. Fe2W-Laves phase can only be found as duration of aging time to 2000 h, and is preferential to form adjacent to M23C6 particles. The small M23C6 particles firstly coarsen, but the large M23C6 are relatively stable during short aging. The total coarsening rate of M23C6 precipitates is 9.75 × 10−28m3s−1, and the coarsening of M23C6 depends on the formation of Laves phase.
format	article
author	Qiuzhi Gao Yanan Zhang Hailian Zhang Huijun Li Fu Qu Jian Han Cheng Lu Bintao Wu Yao Lu Yan Ma
author_facet	Qiuzhi Gao Yanan Zhang Hailian Zhang Huijun Li Fu Qu Jian Han Cheng Lu Bintao Wu Yao Lu Yan Ma
author_sort	Qiuzhi Gao
title	Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
title_short	Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
title_full	Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
title_fullStr	Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
title_full_unstemmed	Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
title_sort	precipitates and particles coarsening of 9cr–1.7w–0.4mo–co ferritic heat-resistant steel after isothermal aging
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d6d611a412fe4c8cb8509e97d7ed1d21
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Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging

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