Small fatigue crack propagation in Y2O3 strengthened steels

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Small fatigue crack propagation in Y2O3 strengthened steels

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Small fatigue crack propagation in Y2O3 strengthened steels

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

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Svazek periodika

452

Číslo periodika v rámci svazku

1-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

370-377

Kód UT WoS článku

000339657200053

EID výsledku v databázi Scopus

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