Ferritic-martensitic oxide-dispersion-strengthened alloy has shown excellent mechanical property and high radiation tolerance. However, the stability of dispersoids during displacive irradiation in the individual ferritic and martensitic phases are unclear. Here, the correlation among dispersoid coherency, size, density, and matrix phase are studied in dual-phase 12Cr ODS after 100 peak displacements per atom (dpa) irradiation at 475°C, using 3.5 MeV Fe²⁺ self-ions. The size and density changes of coherent and incoherent dispersoids were analyzed as a function of irradiation depth. The average dispersoid size decreased after irradiation in both phases, and the large incoherent dispersoids in the tempered martensite phase underwent a more dramatic change than those in ferrite phase. The dispersoid density significantly increased in the ferrite phase within the irradiated region, mostly resulting an increase in coherent dispersoid density. On the other hand, only a small change in density was observed in the tempered martensite phase for both coherent and incoherent dispersoids. This study shows that dispersoid evolution is dramatically different in ferrite and tempered martensite phases.

铁素体-马氏体氧化物分散增强合金具有优异的机械性能和高辐射耐受性。但是，在各个铁素体相和马氏体相的置换辐射过程中，分散质的稳定性尚不清楚。在此，研究了在475°C下使用3.5 MeV Fe ²⁺在每原子（dpa）辐照100个峰值位移后，双相12Cr ODS中弥散相干性，尺寸，密度和基质相之间的相关性。自我离子。分析了相干和不相干弥散体的大小和密度变化与辐照深度的关系。辐射后，两个相中的平均弥散体尺寸均减小，回火马氏体相中较大的非相干弥散体的变化比铁素体相中的变化大得多。在被辐照区域内的铁素体相中，弥散体密度显着增加，主要导致相干弥散体密度的增加。另一方面，对于相干和不相干的弥散体，在回火马氏体相中仅观察到密度的小变化。这项研究表明，在铁素体相和回火马氏体相中，弥散相的演化差异很大。