Understandiong of low cycle fatigue behaviour of ODS steels

0398749 - ÚFM 2014 RIV DE eng C - Konferenční příspěvek (zahraniční konf.)
Kuběna, Ivo - Kruml, Tomáš
Understandiong of low cycle fatigue behaviour of ODS steels.
Proceedings of the Seventh International Conference on Low Cycle Fatigue - LCF7. Berlín: DMV, 2013, s. 439-444. ISBN 978-3-9814516-2-7.
[LCF7 - International Conference on Low Cycle Fatigue /7./. Aachen (DE), 09.09.2013-11.09.2013]
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0068; GA ČR(CZ) GP13-28685P
Institucionální podpora: RVO:68081723
Klíčová slova: crack nucleation * fatigue life prediction * low cycle fatigue * ODS steels * surface relief evolution
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

The low cycle fatigue life in the ODS Eurofer steel and in two 14Cr ODS ferritic steels produced in the CEA was analysed. The Coffin-Manson curve was measured. Substantial differences in fatigue life were found. Surface relief observation after failure revealed places of crack initiation and its influence on fatigue life was explained. Small fatigue crack growth rate measurement was carried out in the ODS Eurofer steel and in one of the 14Cr ODS ferritic steels. It was determined that fatigue crack grow in the 14Cr ODS ferritic steel is significantly faster than in the ODS Eurofer steel. All measured data are discussed and differences between particular steels are explained in relation to the Coffin-Manson plot.
Trvalý link: http://hdl.handle.net/11104/0226206