Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures

In this study, two types of ferritic model alloys (Fe-9Cr and Fe-9Cr-C) were simultaneously irradiated with 3.5 MeV Fe(13+) ions at 450 °C and 550 °C to a dose of 3dpa at the peak damage region, respectively. Transmission electron microscopy (TEM) was used to investigate the microstructural evolutio...

Descripción completa

Detalles Bibliográficos
Autores principales: Shi, Tiantian, Liu, Wenbo, Su, Zhengxiong, Yan, Xu, Lu, Chenyang, Yun, Di
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954294/
https://www.ncbi.nlm.nih.gov/pubmed/35329664
http://dx.doi.org/10.3390/ma15062211
_version_ 1784676059039399936
author Shi, Tiantian
Liu, Wenbo
Su, Zhengxiong
Yan, Xu
Lu, Chenyang
Yun, Di
author_facet Shi, Tiantian
Liu, Wenbo
Su, Zhengxiong
Yan, Xu
Lu, Chenyang
Yun, Di
author_sort Shi, Tiantian
collection PubMed
description In this study, two types of ferritic model alloys (Fe-9Cr and Fe-9Cr-C) were simultaneously irradiated with 3.5 MeV Fe(13+) ions at 450 °C and 550 °C to a dose of 3dpa at the peak damage region, respectively. Transmission electron microscopy (TEM) was used to investigate the microstructural evolution of the Fe-Cr alloys after irradiation. The experimental results showed that the size of the dislocation loops formed in the Fe-9Cr-C alloy was larger than that in the Fe-9Cr alloy, but the loop density of the Fe-9Cr-C alloy was lower than that of the Fe-9Cr alloy after irradiation at 450 °C. The reason for this phenomenon was attributed to the fact that loops formed in Fe-9Cr-C alloy have greater capture efficiency for interstitial atoms. Compared to Fe-Cr alloys irradiated at 450 °C, high-density loops were not observed in the Fe-Cr alloys irradiated at 550 °C; the number of dislocation loops in the Fe-Cr alloys irradiated at 550 °C significantly decreased due to the rapid conversion of the dislocation loops into network dislocations. In addition, subgrains were observed in the Fe-Cr alloys after irradiation. The underlying reason behind the formation of subgrains is discussed in detail.
format Online
Article
Text
id pubmed-8954294
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-89542942022-03-26 Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures Shi, Tiantian Liu, Wenbo Su, Zhengxiong Yan, Xu Lu, Chenyang Yun, Di Materials (Basel) Article In this study, two types of ferritic model alloys (Fe-9Cr and Fe-9Cr-C) were simultaneously irradiated with 3.5 MeV Fe(13+) ions at 450 °C and 550 °C to a dose of 3dpa at the peak damage region, respectively. Transmission electron microscopy (TEM) was used to investigate the microstructural evolution of the Fe-Cr alloys after irradiation. The experimental results showed that the size of the dislocation loops formed in the Fe-9Cr-C alloy was larger than that in the Fe-9Cr alloy, but the loop density of the Fe-9Cr-C alloy was lower than that of the Fe-9Cr alloy after irradiation at 450 °C. The reason for this phenomenon was attributed to the fact that loops formed in Fe-9Cr-C alloy have greater capture efficiency for interstitial atoms. Compared to Fe-Cr alloys irradiated at 450 °C, high-density loops were not observed in the Fe-Cr alloys irradiated at 550 °C; the number of dislocation loops in the Fe-Cr alloys irradiated at 550 °C significantly decreased due to the rapid conversion of the dislocation loops into network dislocations. In addition, subgrains were observed in the Fe-Cr alloys after irradiation. The underlying reason behind the formation of subgrains is discussed in detail. MDPI 2022-03-17 /pmc/articles/PMC8954294/ /pubmed/35329664 http://dx.doi.org/10.3390/ma15062211 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
Shi, Tiantian
Liu, Wenbo
Su, Zhengxiong
Yan, Xu
Lu, Chenyang
Yun, Di
Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures
title Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures
title_full Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures
title_fullStr Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures
title_full_unstemmed Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures
title_short Effect of Carbon on Dislocation Loops Formation during Self-Ion Irradiation in Fe-Cr Alloys at High Temperatures
title_sort effect of carbon on dislocation loops formation during self-ion irradiation in fe-cr alloys at high temperatures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954294/
https://www.ncbi.nlm.nih.gov/pubmed/35329664
http://dx.doi.org/10.3390/ma15062211
work_keys_str_mv AT shitiantian effectofcarbonondislocationloopsformationduringselfionirradiationinfecralloysathightemperatures
AT liuwenbo effectofcarbonondislocationloopsformationduringselfionirradiationinfecralloysathightemperatures
AT suzhengxiong effectofcarbonondislocationloopsformationduringselfionirradiationinfecralloysathightemperatures
AT yanxu effectofcarbonondislocationloopsformationduringselfionirradiationinfecralloysathightemperatures
AT luchenyang effectofcarbonondislocationloopsformationduringselfionirradiationinfecralloysathightemperatures
AT yundi effectofcarbonondislocationloopsformationduringselfionirradiationinfecralloysathightemperatures

Ejemplares similares