Small fatigue crack propagation in Y2O3 strengthened steels

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00434858" target="_blank" >RIV/68081723:_____/14:00434858 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.05.071" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2014.05.071</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.05.071" target="_blank" >10.1016/j.jnucmat.2014.05.071</a>

Result language
angličtina
Original language name
Small fatigue crack propagation in Y2O3 strengthened steels
Original language description
This paper is focused on two type of Y2O3 strengthened steels (Fe?14Cr ODS and ODS-EUROFER). Small fatigue crack propagation was experimentally measured using special small cylindrical specimens (diam-meter 2 and 2.6 mm) with shallow notch grinded in thegauge length. In the middle of this notch, a pre-crack of length of 50 microns was fabricated using a focused ion beam technique. Fatigue crack growth rate was measured for different applied total strain amplitudes and described using plastic part of the J-integral. Obtained results were compared with published data of EUROFER 97. The effect of the oxide dispersion on small fatigue crack propagation was found rather insignificant. Ferritic Fe?14Cr ODS steel shows more brittle behaviour, i.e. for the same cyclic plasticity, characterised by the plastic part of the J-integral, the small cracks grow faster. A new methodology for residual lifetime prediction of structures containing physically small cracks, based on plastic part of the J-i
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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