TEM characterization of dislocation loops in irradiated bcc Fe-based steels
TEM characterization of dislocation loops in irradiated bcc Fe-based steels
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DOI：
10.1016/j.jnucmat.2012.12.002
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发表时间：
2013-03
影响因子：
3.1
通讯作者：
B. Yao;D. Edwards;R. Kurtz
中科院分区：
文献类型：
--
作者：
B. Yao;D. Edwards;R. Kurtz
在这项研究中，我们描述了一种方法来检查位错环在辐照钢的基础上结合晶体学信息和g B不可见性标准。用这种方法可以方便地分析透射电子显微镜（TEM）图像中的位错环。通过这种分析方法，在400°C下辐照的降低活化铁素体/马氏体（RAFM）钢中的位错环已被检查。在辐照RAFM钢中发现的主要类型的环是1/100 <${200}和1/2 <$111 <${111}。这两种类型的位错环的尺寸，密度和密度各向异性进行了量化。据观察，100 <${200}环密度是1/2 <$111 <${111}环密度的两倍以上。发现了一个大的密度各向异性的100 <${200}环。
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.