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In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions

The microstructure evolution of Zr-1.1Nb-1.51Fe-0.26Cu-0.72Ni zirconium alloy, irradiated by 800 keV Kr(2+) ions at 585 K using the IVEM-Tandem Facility at Argonne National Laboratory, was observed by in situ transmission electron microscopy. A number of β-Nb precipitates with a body-centered cubic...

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Autores principales: Lei, Penghui, Ran, Guang, Liu, Chenwei, Ye, Chao, Lv, Dong, Lin, Jianxin, Wu, Yizhen, Xu, Jiangkun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506974/
https://www.ncbi.nlm.nih.gov/pubmed/28772799
http://dx.doi.org/10.3390/ma10040437
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author Lei, Penghui
Ran, Guang
Liu, Chenwei
Ye, Chao
Lv, Dong
Lin, Jianxin
Wu, Yizhen
Xu, Jiangkun
author_facet Lei, Penghui
Ran, Guang
Liu, Chenwei
Ye, Chao
Lv, Dong
Lin, Jianxin
Wu, Yizhen
Xu, Jiangkun
author_sort Lei, Penghui
collection PubMed
description The microstructure evolution of Zr-1.1Nb-1.51Fe-0.26Cu-0.72Ni zirconium alloy, irradiated by 800 keV Kr(2+) ions at 585 K using the IVEM-Tandem Facility at Argonne National Laboratory, was observed by in situ transmission electron microscopy. A number of β-Nb precipitates with a body-centered cubic (BCC) structure were distributed in the as-received zirconium alloy with micrometer-size grains. Kr(2+) ion irradiation induced the growth of β-Nb precipitates, which could be attributed to the segregation of the dissolved niobium atoms in the zirconium lattice and the migration to the existing precipitates. The size of precipitates was increased with increasing Kr(2+) ion fluence. During Kr(2+) iron irradiation, the zirconium crystals without Nb precipitates tended to transform to the nanocrystals, which was not observed in the zirconium crystals with Nb nanoparticles. The existing Nb nanoparticles were the key factor that constrained the nanocrystallization of zirconium crystals. The thickness of the formed Zr-nanocrystal layer was about 300 nm, which was consistent with the depth of Kr(2+) iron irradiation. The mechanism of the precipitate growth and the formation of zirconium nanocrystal was analyzed and discussed.
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spelling pubmed-55069742017-07-28 In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions Lei, Penghui Ran, Guang Liu, Chenwei Ye, Chao Lv, Dong Lin, Jianxin Wu, Yizhen Xu, Jiangkun Materials (Basel) Article The microstructure evolution of Zr-1.1Nb-1.51Fe-0.26Cu-0.72Ni zirconium alloy, irradiated by 800 keV Kr(2+) ions at 585 K using the IVEM-Tandem Facility at Argonne National Laboratory, was observed by in situ transmission electron microscopy. A number of β-Nb precipitates with a body-centered cubic (BCC) structure were distributed in the as-received zirconium alloy with micrometer-size grains. Kr(2+) ion irradiation induced the growth of β-Nb precipitates, which could be attributed to the segregation of the dissolved niobium atoms in the zirconium lattice and the migration to the existing precipitates. The size of precipitates was increased with increasing Kr(2+) ion fluence. During Kr(2+) iron irradiation, the zirconium crystals without Nb precipitates tended to transform to the nanocrystals, which was not observed in the zirconium crystals with Nb nanoparticles. The existing Nb nanoparticles were the key factor that constrained the nanocrystallization of zirconium crystals. The thickness of the formed Zr-nanocrystal layer was about 300 nm, which was consistent with the depth of Kr(2+) iron irradiation. The mechanism of the precipitate growth and the formation of zirconium nanocrystal was analyzed and discussed. MDPI 2017-04-22 /pmc/articles/PMC5506974/ /pubmed/28772799 http://dx.doi.org/10.3390/ma10040437 Text en © 2017 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lei, Penghui
Ran, Guang
Liu, Chenwei
Ye, Chao
Lv, Dong
Lin, Jianxin
Wu, Yizhen
Xu, Jiangkun
In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions
title In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions
title_full In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions
title_fullStr In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions
title_full_unstemmed In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions
title_short In Situ TEM Study of Microstructure Evolution of Zr-Nb-Fe Alloy Irradiated by 800 keV Kr(2+) Ions
title_sort in situ tem study of microstructure evolution of zr-nb-fe alloy irradiated by 800 kev kr(2+) ions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506974/
https://www.ncbi.nlm.nih.gov/pubmed/28772799
http://dx.doi.org/10.3390/ma10040437
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