Počet záznamů: 1

Fatigue cracks in Eurofer 97 steel: Part II. Comparison of small and long fatigue crack growth

  1. 1.
    0359061 - UFM-A 2012 RIV NL eng J - Článek v odborném periodiku
    Kruml, Tomáš - Hutař, Pavel - Náhlík, Luboš - Seitl, Stanislav - Polák, Jaroslav
    Fatigue cracks in Eurofer 97 steel: Part II. Comparison of small and long fatigue crack growth.
    Journal of Nuclear Materials. Roč. 412, 1 (2011), s. 7-12 ISSN 0022-3115
    Grant CEP: GA ČR GA106/09/1954; GA ČR GA101/09/0867
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: ferritic-martensitic steel * long crack growth * small crack growth * crack closure
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika
    Impakt faktor: 2.052, rok: 2011

    The fatigue crack growth rate in the Eurofer 97 steel at room temperature was measured by two different methodologies. Small crack growth data were obtained using cylindrical specimens with a shallow notch and no artificial crack starters. The growth of semicircular cracks of length between 10–2000 lm was followed in symmetrical cycling with constant strain amplitude (Re = 1). Long crack data were measured using standard CT specimen and ASTM methodology, i.e. R = 0.1. The growth of cracks having the length in the range of 10–30 mm was measured. It is shown that the crack growth rates of both types of cracks are in a very good agreement if J-integral representation is used and usual assumptions of the crack closure effects are taken into account.
    Trvalý link: http://hdl.handle.net/11104/0196930