Microstructural changes upon annealing in ODS-strengthened ultrafine grained ferritic steel

Zbigniew Oksiuta; Pawel Kozikowski; Malgorzata Lewandowska; Masato Ohnuma; Koppoju Suresh; Krzysztof J. Kurzydlowski

doi:10.1007/s10853-013-7255-3

journal article·2013-07Open access

Microstructural changes upon annealing in ODS-strengthened ultrafine grained ferritic steel

Zbigniew Oksiuta, Pawel Kozikowski, Malgorzata Lewandowska, Masato Ohnuma, Koppoju Suresh, Krzysztof J. Kurzydlowski

Journal of Materials Science· Volume 48· Issue 13

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Abstract

In this study, the stability of grain size and oxide nanoparticles in the ODS steel upon annealing at high temperature (650–1350 °C) has been evaluated. The ODS Fe–Cr–W–Ti–Y 2 O 3 steel has been manufactured by powder metallurgy, consolidated by hot isostatic pressing and processed by hydrostatic extrusion. Such a processing brings about ultrafine grain structure reinforced with oxide nanoparticles (few nm in diameter) and results in superior mechanical properties. The stability of nano-oxides has been analyzed by small angle X-ray scattering together with transmission electron microscopy. The results obtained revealed excellent thermal stability of ultrafine grained ODS ferritic steel, which was attributed to the resistance of oxides against coarsening.

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Research context

Metals & alloys Nanomaterials Composites Materials processing

OpenAlex topics: Fusion materials and technologies · Microstructure and mechanical properties · Nuclear Materials and Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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