论文标题
与辐照诱导的缺陷相关的弹性应变
Elastic Strain Associated with Irradiation-Induced Defects in Self-ion Irradiated Tungsten
论文作者
论文摘要
弹性相互作用在控制辐照损伤演化中起着重要作用，但在很大程度上仍未实验。使用透射电子显微镜（TEM）和高分辨率的轴透射kikuchi衍射（HR-TKD），我们将照射诱导的损伤结构的演变和自辐射纯纯钨中的相关晶格菌株相关联。 TEM揭示了不同的位错环结构，这是样品厚度的函数，这表明自由表面限制了在较厚样品中发现的扩展缺陷结构的形成。 HR-TKD菌株分析显示，以高于0.01 dPa的晶体学导向的长距离应变波动的形成，总弹性能量降低了0.1 dpa。
Elastic interactions play an important role in controlling irradiation damage evolution, but remain largely unexplored experimentally. Using transmission electron microscopy (TEM) and high-resolution on-axis transmission Kikuchi diffraction (HR-TKD), we correlate the evolution of irradiation-induced damage structures and the associated lattice strains in self-ion irradiated pure tungsten. TEM reveals different dislocation loop structures as a function of sample thickness, suggesting that free surfaces limit the formation of extended defect structures found in thicker samples. HR-TKD strain analysis shows the formation of crystallographically-orientated long-range strain fluctuation above 0.01 dpa and a decrease of total elastic energy above 0.1 dpa.
