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Towards understanding the evolution of dislocation loops and their interaction with vacancies in Fe9Cr alloy during the irradiation swelling incubation period
Shuoxue Jin;  Bing Mo;  Weiping Zhang;  Tongmin Zhang;  Yang Li;  Liping Guo;  Xingzhong Cao;  Baoyi Wang
2019
Source PublicationMaterialia
Volume5Pages:1-6
Abstract

It is well known that body-centered cubic metals have much longer swelling incubation periods than face-centered cubic metals during neutron or charged particle irradiation. In this paper, Fe9Cr model alloy was irradiated with 2 MeV self-ions to lower doses of 0.5, 1.0 and 3.0 dpa at room temperature. The evolution of microstructural defects was revealed by transmission electron microscopy and positron annihilation spectroscopy. Small interstitial dislocation loops were observed in the form of black spots and they were accompanied by a large number of vacancies after 0.5 dpa. Visible dislocation loops dominated the microstructure after irradiation with 1.0 dpa and 3.0 dpa, but the sharp decrement of the S value means that the vacancies should be annihilated gradually with the irradiation dose increasing. In addition, the vacancy status was further confirmed by the investigation of their occupation behaviors with low-energy deuterium atoms. The vacancies located around loops would be trapped and removed by the coarsening interstitial dislocation loops. We believe that the understanding of the interaction between vacancies and dislocation loops is a possible complementary mechanism, applicable for explaining the long stage of swelling incubation in bcc metals.

KeywordDislocation Loops vacancies positron Annihilation Spectroscopy fecr Alloy
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10614
Collection月球与行星科学研究中心
Affiliation1.Multi-Discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
3.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
4.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Recommended Citation
GB/T 7714
Shuoxue Jin;Bing Mo;Weiping Zhang;Tongmin Zhang;Yang Li;Liping Guo;Xingzhong Cao;Baoyi Wang. Towards understanding the evolution of dislocation loops and their interaction with vacancies in Fe9Cr alloy during the irradiation swelling incubation period[J]. Materialia,2019,5:1-6.
APA Shuoxue Jin;Bing Mo;Weiping Zhang;Tongmin Zhang;Yang Li;Liping Guo;Xingzhong Cao;Baoyi Wang.(2019).Towards understanding the evolution of dislocation loops and their interaction with vacancies in Fe9Cr alloy during the irradiation swelling incubation period.Materialia,5,1-6.
MLA Shuoxue Jin;Bing Mo;Weiping Zhang;Tongmin Zhang;Yang Li;Liping Guo;Xingzhong Cao;Baoyi Wang."Towards understanding the evolution of dislocation loops and their interaction with vacancies in Fe9Cr alloy during the irradiation swelling incubation period".Materialia 5(2019):1-6.
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