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 h100i{200} and 1/2h111i 111. The size, density, and density anisotropy of these two types of dislocation loops were quantified. It was observed that the h100i{200} loop density is more than twice that of 1/2h111i{111} loops. A large density anisotropy of h100i{200} loops was identified.
Revised: January 22, 2014 |
Published: December 8, 2012
Citation
Yao B., D.J. Edwards, and R.J. Kurtz. 2012.TEM characterization of dislocation loops in irradiated bcc Fe-based steels.Journal of Nuclear Materials 434, no. 1-3:402-410.PNNL-SA-96958.doi:10.1016/j.jnucmat.2012.12.002