Oxide dispersion strengthened (ODS) reduced activation ferritic steels are leading candidates to become part of the structure of the first wall/blanket of future fusion reactors. Their major drawback is their poor toughness, which must be improved. In this work, an ODS ferritic steel having nominal composition Fe–14Cr–2W–0.2Ti–0.55 Fe₂Y (wt%), produced by mechanical alloying of prealloyed powders with Fe₂Y intermetallic particles and consolidated by hot isostatic pressing, was subjected to either thermal treatments at high temperature or hot cross rolling in an attempt to investigate the effectiveness of such post-consolidation thermomechanical treatments. Its microstructure, nanoparticle dispersion and mechanical properties were analysed and correlated on each condition. As compared with the annealing treatments hot cross rolling led to a significant decrease in the grain size as well as a slight decrease in the size of some of the secondary phases present in the material. Also, the impact and tensile behaviour was improved over the whole temperature range studied.

氧化物弥散增强（ODS）还原活化铁素体钢是成为未来聚变反应堆第一层壁/毛毯结构的一部分的领先候选者。它们的主要缺点是韧性差，必须加以改善。在这项工作中，通过预合金粉末与Fe _2的机械合金化生产了名义成分为Fe–14Cr–2W–0.2Ti–0.55 Fe ₂ Y（wt％）的ODS铁素体钢。Y金属间化合物颗粒和通过热等静压固结的固溶体，无论是在高温下还是在热交叉轧制下进行热处理，以试图研究这种固结后热机械处理的有效性。在每种条件下分析并关联了其微观结构，纳米颗粒分散性和力学性能。与退火处理相比，热交叉轧制导致晶粒尺寸显着减小以及材料中某些次级相的尺寸略有减小。而且，在整个研究温度范围内，冲击和拉伸性能得到了改善。