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Influence of Hot Consolidation Conditions and Cr-Alloying on Microstructure and Creep in New-Generation ODS Alloy at 1100 °C
Article

Fundamental Improvement of Creep Resistance of New-Generation Nano-Oxide Strengthened Alloys via Hot Rotary Swaging Consolidation

1
Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, 616 62 Brno, Czech Republic
2
Faculty of Materials Science and Technology, VŠB–Technical University of Ostrava, 17. Listopadu 15, 708 33 Ostrava, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2020, 13(22), 5217; https://doi.org/10.3390/ma13225217
Received: 22 October 2020 / Revised: 13 November 2020 / Accepted: 16 November 2020 / Published: 18 November 2020
(This article belongs to the Special Issue Creep and High Temperature Deformation of Steels and Alloys)
New-generation oxide dispersion-strengthened (ODS) alloys with a high volume fraction of nano-oxides of 5% are intended to become the leading creep- and oxidation-resistant alloys for applications at 1100–1300 °C. Hot consolidation of mechanically alloyed powders by intensive plastic deformation followed by heat treatment of the alloys are the key aspects for achieving top creep properties, typically ensured by a coarse-grained microstructure strengthened with homogeneously dispersed, very stable yttrium nano-oxides. The rotary swaging method proves to be favourable for hot consolidation of the new-generation ODS alloy presented. Compared to specimens consolidated by hot rolling, consolidation by hot rotary swaging predetermines the formation of coarse grains with a very high aspect ratio during subsequent secondary recrystallization. Such a grain morphology increases the creep strength of the new-generation ODS alloy considerably. View Full-Text
Keywords: oxide dispersion strengthened (ODS) alloy; mechanical alloying; powder hot consolidation; rolling; rotary swaging oxide dispersion strengthened (ODS) alloy; mechanical alloying; powder hot consolidation; rolling; rotary swaging
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MDPI and ACS Style

Svoboda, J.; Kunčická, L.; Luptáková, N.; Weiser, A.; Dymáček, P. Fundamental Improvement of Creep Resistance of New-Generation Nano-Oxide Strengthened Alloys via Hot Rotary Swaging Consolidation. Materials 2020, 13, 5217. https://doi.org/10.3390/ma13225217

AMA Style

Svoboda J, Kunčická L, Luptáková N, Weiser A, Dymáček P. Fundamental Improvement of Creep Resistance of New-Generation Nano-Oxide Strengthened Alloys via Hot Rotary Swaging Consolidation. Materials. 2020; 13(22):5217. https://doi.org/10.3390/ma13225217

Chicago/Turabian Style

Svoboda, Jiří; Kunčická, Lenka; Luptáková, Natália; Weiser, Adam; Dymáček, Petr. 2020. "Fundamental Improvement of Creep Resistance of New-Generation Nano-Oxide Strengthened Alloys via Hot Rotary Swaging Consolidation" Materials 13, no. 22: 5217. https://doi.org/10.3390/ma13225217

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