Abstract

The effect of 15-keV Ar⁺ ions on the structure of austenitic chromium-nickel steel in the 3.1 × 10¹⁷–7.5 × 10¹⁷ cm^–2 fluence range has been investigated in this work. X-ray diffraction analysis indicates a nonmonotonous change in the lattice parameter and the level of microstresses in some crystallographic directions with increasing fluence. The anisotropy appearance of these stresses gradually decreases and the texture becomes weaker. These processes are associated with radiation defects at the initial stage of irradiation and their radiation-induced annealing as the fluence increases. Transmission electron microscopy has revealed atomic separation in the solid solution and a decrease in the dislocation density in the steel starting from a fluence of 5 × 10¹⁷ cm^–2 (40 dpa). Similar data have been obtained when steel of a similar composition has been exposed to high-energy ions. No pore formation has been detected under the used irradiation conditions, since the swelling threshold (according to known estimates, ~70 dpa) has not been reached.

中文翻译：

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中能Ar +离子辐照对奥氏体铬镍钢组织的影响

摘要

15keV Ar ⁺离子对3.1×10 ¹⁷ –7.5×10 ¹⁷ cm ^–2的奥氏体铬镍钢结构的影响这项工作已研究了注量范围。X射线衍射分析表明，随着注量的增加，晶格参数和微应力水平在某些晶体学方向上发生了非单调变化。这些应力的各向异性出现逐渐减小，并且质地变弱。这些过程与辐射初始阶段的辐射缺陷相关联，并且随着通量的增加，它们会引起辐射诱导的退火。透射电子显微镜揭示了固溶中的原子分离，并且从5×10 ¹⁷ cm ^–2的注量开始，钢中的位错密度降低。（40 dpa）。当相似成分的钢暴露于高能离子时，也获得了相似的数据。由于未达到溶胀阈值（根据已知的估计值，约70 dpa），因此在使用的辐照条件下未检测到孔的形成。