Počet záznamů: 1

An Evaluation of Creep Mechanisms in Ultrafine-Grained Metals

  1. 1.
    0359645 - UFM-A 2012 RIV CH eng J - Článek v odborném periodiku
    Kvapilová, Marie - Sklenička, Václav - Dvořák, Jiří - Král, Petr
    An Evaluation of Creep Mechanisms in Ultrafine-Grained Metals.
    Key Engineering Materials. Roč. 465, - (2011), s. 382-385 ISSN 1013-9826.
    [MSMF /6./ Materials Structure and Micromechanics of Fracture. Brno, 28.06.2010-30.06.2010]
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: creep * equal-chanel angular pressing * ultrafine-grained microstructure
    Kód oboru RIV: JJ - Ostatní materiály

    Our earlier published creep data are analyzed for ultrafine-grained pure aluminium and copper processed by equal-channel angular pressing (ECAP). The analysis demonstrates conclusively that creep occurs in the investigated materials after ECAP by the same mechanism as in conventional coarse-grained materials with intergranular dislocation glide and climb as the dominant ratecontrolling flow process. Under creep conditions examined in this work diffusion creep is not important in pure aluminium and copper because the ultrafine grains are unstable at elevated and/or high temperature creep and the grains grow sufficiently to preclude any significant contribution from Nabarro-Herring or Coble creep
    Trvalý link: http://hdl.handle.net/11104/0197390