TEM characterization of dislocation loops in irradiated bcc Fe-based steels

In this study, we describe a methodology to examine dislocation loops in irradiated steels based on a combination of crystallographic information and g⋅b invisibility criteria. Dislocation loops in transmission electron microscope (TEM) images can be conveniently analyzed using this method. Through...

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Bibliographic Details
Published in:Journal of nuclear materials 2013-03, Vol.434 (1-3), p.402-410
Main Authors: Yao, B., Edwards, D.J., Kurtz, R.J.
Format: Article
Language:English
Subjects:
Activation analysis
Anisotropy
Applied sciences
Controled nuclear fusion plants
Density
Dislocation loops
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Irradiation
Martensitic stainless steels
Nuclear fuels
Steels
Transmission electron microscopy
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Summary:In this study, we describe a methodology to examine dislocation loops in irradiated steels based on a combination of crystallographic information and g⋅b invisibility criteria. Dislocation loops in transmission electron microscope (TEM) images can be conveniently analyzed using this method. Through this analysis approach, dislocation loops in reduced activation ferritic/martensitic (RAFM) steels irradiated at 400°C have been examined. The predominant types of loops found in irradiated RAFM steels were 〈100〉{200} and 1/2〈111〉{111}. The size, density, and density anisotropy of these two types of dislocation loops were quantified. It was observed that the 〈100〉{200} loop density is more than twice that of 1/2〈111〉{111} loops. A large density anisotropy of 〈100〉{200} loops was identified.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2012.12.002