Počet záznamů: 1

Cyclic response and fatigue life of TiAl alloys at high temperatures

  1. 1.
    0353854 - UFM-A 2011 RIV CH eng J - Článek v odborném periodiku
    Kruml, Tomáš - Obrtlík, Karel - Petrenec, Martin - Polák, Jaroslav
    Cyclic response and fatigue life of TiAl alloys at high temperatures.
    Key Engineering Materials. Roč. 417 - 418, - (2010), s. 585-588 ISSN 1013-9826.
    [8th International Conference on Fracture and Damage Mechanics. St. Georges Bay, 08.09.2009-10.09.2010]
    Grant CEP: GA ČR GA106/07/0762; GA ČR GA106/08/1631
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: TiAl * lamellar microstructure * low cycle fatigue * transmission electron microscopy
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika

    Fatigue properties of the new generation of TiAl alloys with 8at.% of Nb were studied and compared with those reported in the literature for previous generation with 2at.% of Nb. The high Nb content improves substantially the fatigue life time in the Basquin representation. Nevertheless, the fracture behaviour is still rather brittle even at 750°C. TEM study of the material after the fatigue testing was performed. The dislocation activity is concentrated in the gamma phase. The properties and behaviour of individual dislocations seem to be similar as those observed in single gamma phase TiAl alloys.
    Trvalý link: http://hdl.handle.net/11104/0192983