Počet záznamů: 1

Fatigue behaviour and surface relief in ODS steels

  1. 1.
    0368858 - UFM-A 2012 RIV NL eng J - Článek v odborném periodiku
    Kruml, Tomáš - Kuběna, Ivo - Polák, Jaroslav
    Fatigue behaviour and surface relief in ODS steels.
    Procedia Engineering. Roč. 10, - (2011), s. 1685-1690 E-ISSN 1877-7058
    Grant CEP: GA ČR GA106/09/1954
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: fatigue * life time * surface relief
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika

    Low cycle fatigue behaviour at room temperature of two 14Cr ferritic steels with ultrafine grains and strengthened by fine oxide dispersion is studied. The two steels differ mainly in the grain size distribution (uniform and bimodal). It is shown that the bimodal grain size distribution has a detrimental effect on the fatigue life time. The rough surface relief is formed in grains bigger than 1 micrometer in diameter. Nucleation and early growth of fatigue cracks is facilitated by the surface relief which leads to important reduction of the fatigue life
    Trvalý link: http://hdl.handle.net/11104/0203084