Oxides dispersion strengthened ferritic steels with bimodal-grains prepared by powder metallurgy (PM) have excellent strength-ductility synergy. However, the strengthening oxides can hardly be introduced into coarse grains by traditional PM methods, which limits the overall strength. In this work, to further enhance the mechanical property of PM ferritic steel, the face centered cubic ε-Cu phase was precipitated in both fine and coarse grains via aging hardening, and its strengthening effects was evaluated.

中文翻译：

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通过时效硬化，通过添加铜来增强双峰晶粒粉末冶金铁素体钢

通过粉末冶金（PM）制备的具有双峰晶粒的氧化物弥散强化铁素体钢具有出色的强度-延性协同作用。然而，通过传统的粉末冶金方法很难将强化氧化物引入粗晶粒中，这限制了整体强度。在这项工作中，为进一步提高PM铁素体钢的机械性能，通过时效硬化在细晶粒和粗晶粒中均析出了面心立方ε-Cu相，并评估了其强化效果。