Ultra-high purity Fe(Cr) alloys (from 0 wt% Cr to 14 wt% Cr) were 3D homogeneously irradiated by 0–7.2 MeV protons to 0.3 dpa at nominal temperatures from 270 °C to 500 °C. Microstructural changes were observed by transmission electron microscopy (TEM). The results showed that evolution of dislocation loops depends on the Cr content. Below 300 °C, large ½ a₀ <111> loops are dominating. Above 300 °C, a₀ <100> loops with a habit plane {100} appear. Loop sizes of both types are more or less the same. At temperatures from 310 °C to 400 °C, a₀ <100> loops form clusters with the same {100} habit plane as the one of the loops forming them. This indicates that <100> loops of the same variant start gliding under mutual elastic interaction. At 500 °C, dislocation loops form disc shaped clusters about 1000 nm in diameter and sitting on {111} and/or {100} planes in the pure Fe samples. Based on these observations a quantitative analysis of the dislocation loops configurations and their temperature dependence is made, leading to an understanding of the basic mechanisms of formation of these loops.

在270°C至500°C的标称温度下，通过0-7.2 MeV质子对0.3 dpa的超高纯Fe（Cr）合金（Cr含量从0 wt％到14 wt％）进行3D均匀辐照。通过透射电子显微镜（TEM）观察到微结构变化。结果表明，位错环的演化取决于Cr的含量。低于300°C，占主导地位的是大½a ₀ <111>环路。高于300°C，出现₀ <100>循环，并带有一个惯性平面{100}。两种类型的循环大小大致相同。在310°C至400°C的温度下，₀<100>循环形成的簇具有与构成它们的循环之一相同的{100}习惯平面。这表明相同变体的<100>环在相互弹性相互作用下开始滑动。在500°C下，位错环形成直径约为1000 nm的圆盘状簇，并位于纯Fe样品的{111}和/或{100}平面上。基于这些观察，对位错环的构型及其温度依赖性进行了定量分析，从而使人们了解了这些环形成的基本机理。