Nano-oxide precipitation kinetics during the consolidation process of a ferritic oxide dispersion strengthened steel

SCRIPTA MATERIALIA

卷:188

Article

Spartacus, Gabriel¹  Malaplate, Joel¹  De Geuser, Frederic²  Sornin, Denis¹  Gangloff, Amelie¹  Guillou, Raphaelle¹  Deschamps, Alexis² 

[1] Univ Paris Saclay, CEA, Serv Rech Met Appl, CEA, F-91191 Gif Sur Yvette, France

[2] UJF, CNRS, Grenoble INP, SIMAP, 1130 Rue Piscine,BP 75, F-38402 St Martin Dheres, France

关键词: Ferritic steels;    Oxide dispersion strengthened (ods) alloy;    Nano-featured alloys (nfa);    Precipitation kinetics;    Small Angle X-ray Scattering (SAXS);   

DOI  :  10.1016/j.scriptamat.2020.07.003

来源: Elsevier

【 摘 要 】

Oxide Dispersion Strengthened (ODS) steels are candidates for nuclear applications. ODS are produced by mechanical alloying of Fe-14Cr, Y2O3 and TiH2 powders and consolidation at 1100 degrees C, resulting in finely dispersed nano-oxides. Their precipitation kinetics has been quantitatively determined by in-situ Small Angle X-ray Scattering during continuous heating up to 1100 degrees C. Clusters, found in the as-milled state start growing at 450 degrees C until 1100 degrees C, while almost no coarsening was recorded during subsequent isothermal annealing. The nano-oxides resulting from these in-situ experiments were found to be representative of those in materials processed by hot isostatic pressing and hot extrusion. (C) 2020 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

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