Low cycle fatigue behaviour of ODS steels for nuclear application

0368992 - ÚFM 2012 RIV CH eng J - Journal Article
Kuběna, Ivo - Kruml, Tomáš - Fournier, B. - Polák, Jaroslav
Low cycle fatigue behaviour of ODS steels for nuclear application.
Key Engineering Materials. Roč. 465, - (2011), s. 556-559. ISSN 1013-9826
R&D Projects: GA ČR GA106/09/1954; GA ČR GA101/09/0867
Institutional research plan: CEZ:AV0Z20410507
Keywords : Generation IV nuclear reactors * fusion energy * ODS steels * low cycle fatigue * cyclic softening
Subject RIV: JL - Materials Fatigue, Friction Mechanics

This study deals with the low cycle fatigue (LCF) behaviour of two steels strengthened by oxide dispersion. The ODS Eurofer steel shows cyclic softening, slower than in the case of the same steel without oxide particles. The 14Cr ODS ferritic steel is cyclically stable, even a slight cyclic hardening is observed at 650 °C. The reasons for this different behaviour lie probably in the less resistant matrix with a lot of weak subgrain boundaries in ODS Eurofer, because no clear difference in the oxide particles distribution was found.
Permanent Link: http://hdl.handle.net/11104/0203175