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Powder Particle Size Effects on Microstructure and Mechanical Properties of Mechanically Alloyed ODS Ferritic Steels

Oñoro, Moisés ; Macías-Delgado, Julio; Auger, María A.; Hoffmann, Jan 1; Castro, Vanessa de; Leguey, Teresa
1 Karlsruher Institut für Technologie (KIT)


Reduced activation ferritic (RAF) steels are expected to be widely used in challenging nuclear industrial applications under severe thermo-mechanical regimes and intense neutron loads. Therefore, actual research panorama is facing the strengthening strategies necessary to maximize both performance and endurance under these conditions. Oxide dispersion strengthened (ODS) RAF steels are leader candidates as structural materials in fusion energy reactors thanks to the reinforcement obtained with a fine dispersion of nanosized oxides in their matrix. In this study, the influence of the initial powder particle size and the selected processing route on the final material has been investigated. Two RAF ODS steels coming from atomized pre-alloyed powders with nominal particle powder sizes of 70 and 30 µm and composition Fe-14Cr-2W-0.4Ti-0.3Y$_{2}$O$_{3}$ (wt. %) were manufactured by mechanical alloying. Alloyed powders were compacted by hot isostatic pressing, hot crossed rolled, and annealed at 1273 K. Initial powder particle size differences minimize after milling. Both steels present an almost completely recrystallized material and similar grain sizes. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000143117
Veröffentlicht am 16.02.2022
DOI: 10.3390/met12010069
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2075-4701
KITopen-ID: 1000143117
HGF-Programm 31.13.05 (POF IV, LK 01) Neutron-Resistant Structural Materials
Erschienen in Metals
Verlag MDPI
Band 12
Heft 1
Seiten Art. Nr.: 69
Vorab online veröffentlicht am 30.12.2021
Schlagwörter ODS steel, powder size, ferritic steel, mechanical alloying, EBSD, nanoparticle, oxide, TEM
Nachgewiesen in Dimensions
Web of Science
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