Data for: Microstructure evolution of modified 310S austenitic stainless steels under argon ion irradiation at different temperatures

The effects of oversized additive atoms on microstructure evolution in 310S stainless steel under irradiation was investigated. Irradiations of 120 -keV Ar+ were conducted on two types of modified 310S stainless steel at 290 °C and 550 °C. SC-1 was modified with Zr and SC-2 was modified with Nb, Ta and W. Compared with SC-2, low density, smaller cavities formed in SC-1 at 290 °C. When the temperature was increased to 550 °C, different cavity behaviors were observed in the two materials. In SC-1, as the irradiation temperature changed from 290 °C to 550 °C, the average cavity size increased while the cavity density dropped to a lower value; however, in SC-2, the average size and density of cavities shifted to larger values. At 550 °C, low density, larger cavities were observed in SC-1 compared with SC-2. In addition, precipitates enriched with Ni were observed in SC-1, while Nb- and Ta-enriched precipitates were found in SC-2. TEM images, EDS results of precipitates and average size and density of cavities and precipitates are provided.

本研究旨在探讨在辐照条件下， oversized additive atoms 对 310S 不锈钢微观结构演变的影响。实验采用 120-keV Ar+ 离子辐照两种不同改性的 310S 不锈钢，辐照温度分别为 290 °C 和 550 °C。其中，SC-1 型号经过 Zr 元素改性，而 SC-2 型号则经过 Nb、Ta 和 W 元素的改性。与 SC-2 相比，在 290 °C 下，SC-1 中形成了低密度、尺寸较小的空穴。当温度升至 550 °C 时，两种材料表现出不同的空穴行为。在 SC-1 中，随着辐照温度从 290 °C 增至 550 °C，平均空穴尺寸增大，而空穴密度降低至更低水平；然而，在 SC-2 中，空穴的平均尺寸和密度均向较大值偏移。在 550 °C 下，SC-1 中观察到低密度、较大的空穴，与 SC-2 相比差异显著。此外，在 SC-1 中观察到富含 Ni 的析出物，而在 SC-2 中则发现了富含 Nb 和 Ta 的析出物。研究提供了 TEM 图像、析出物的 EDS 结果以及空穴和析出物的平均尺寸和密度数据。