Radiation induced segregation (RIS) on lattice defects and phase stability under irradiation have been investigated in an optimized solution annealed 316L(N) with an increased content of N and a significant amount of Nb. Primary Z-phase nitrides were observed within the as-received microstructure. 5 MeV Fe³⁺ ion irradiation was conducted at 450 °C up to 1dpa. Post-ion irradiation characterization was performed via nanoscale techniques coupling and correlation to associate radiation induced defects such as cavities and dislocation loops to the local chemistry. Cr, Fe and Ni observed RIS trends were expected, but P was solely measured at the vicinity of cavities. Void-precipitate association has been detected thanks to transmission electron microscopy (TEM) and it is believed to explain the low reduced atomic density measured at the location of a feature within an atom probe tomography (APT) volume. Nb-rich novel features were observed after irradiation and first results are brought to establish a link between these features and the primary Z-phase.

已经在优化的固溶退火 316L(N) 中研究了辐射引起的晶格缺陷和相稳定性的辐射诱导偏析 (RIS)，其中 N 含量增加，Nb 含量显着增加。在原样的微观结构中观察到初级 Z 相氮化物。5 MeV Fe ³⁺离子辐照在 450 °C 下进行，最高可达 1dpa。离子辐射后表征是通过纳米级技术耦合和相关性进行的，以将辐射诱导的缺陷（例如腔和位错环）与局部化学联系起来。Cr、Fe 和 Ni 观察到的 RIS 趋势在意料之中，但 P 仅在空腔附近测量。借助透射电子显微镜 (TEM) 已检测到空隙-沉淀物关联，据信这可以解释在原子探针断层扫描 (APT) 体积内的特征位置处测量到的低原子密度降低的原因。辐照后观察到富含 Nb 的新特征，并带来了第一个结果，以在这些特征和初级 Z 相之间建立联系。