Ferritic/Martensitic (F/M) steel T91 was irradiated in-situ to 4 and 10 dpa at 470 °C using 1 MeV Kr²⁺. The microstructure evolution under irradiation was followed and characterized by in-situ Transmission Electron Microscopy (TEM), in terms of dislocation loop Burgers vector, average size and density as a function of dose. Furthermore, the influence of the presence of dislocations in the pre-irradiated matrix was investigated by comparing the radiation induced defect evolution in grains with and without initial dislocations.

中文翻译：

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F / M T91钢在原位离子辐照下位错环的演变：初始位错的存在的影响

使用1 MeV Kr ²⁺在470°C下将铁素体/马氏体（F / M）钢T91原位辐射至4和10 dpa 。通过位错环Burgers载体，平均尺寸和密度作为剂量的函数，追踪并观察了辐照下的微观结构演变，并通过原位透射电子显微镜（TEM）进行了表征。此外，通过比较在有和没有初始位错的晶粒中，辐射诱发的缺陷演化，研究了预辐照基体中位错的存在的影响。