Počet záznamů: 1

Cyclic plastic response and fatigue life in superduplex 2507 stainless steel

  1. 1.
    0332428 - UFM-A 2010 RIV GB eng J - Článek v odborném periodiku
    Polák, Jaroslav - Petrenec, Martin - Kruml, Tomáš
    Cyclic plastic response and fatigue life in superduplex 2507 stainless steel.
    International Journal of Fatigue. Roč. 32, č. 2 (2010), s. 279-287 ISSN 0142-1123
    Grant CEP: GA AV ČR IAA100480704; GA ČR GA101/07/1500
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: Cyclic plasticity * Hysteresis loop * Fatigue life * Superduplex steel
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika
    Impakt faktor: 1.799, rok: 2010

    Superduplex 2507 type steel has been subjected to symmetric cyclic loading with constant strain rate and constant plastic strain amplitude or sinusoidal cyclic loading with constant stress amplitude at room temperature in a wide interval of stress and plastic strain amplitudes. Fatigue hardening/softening curves were recorded and compared for both types of loading. Cyclic stress–strain curves and fatigue life curves in the form of Coffin–Manson curve and Wöhler curve using both loading regimes were evaluated and compared. The analysis of the hysteresis loop shape was used to determine the contribution of the effective stress and to find the distribution of critical internal stresses in both phases of the steel. The typical internal dislocation structure in both phases was documented. The cyclic response of the material was discussed in relation to the dislocation structure developed in cyclic straining in austenitic and ferritic phases.
    Trvalý link: http://hdl.handle.net/11104/0177691