Počet záznamů: 1  

High temperature deformation mechanisms in the 14% Cr ODS alloy

  1. 1. 0479202 - UFM-A 2018 RIV CH eng J - Článek v odborném periodiku
    Šiška, Filip - Stratil, Luděk - Hadraba, Hynek - Fintová, Stanislava - Kuběna, Ivo - Záležák, Tomáš - Bártková, Denisa
    High temperature deformation mechanisms in the 14% Cr ODS alloy.
    Materials Science and Engineering A-Structural materials. Roč. 689, MAR (2017), s. 34-39 ISSN 0921-5093
    Grant CEP: GA ČR(CZ) GA14-25246S; GA ČR GJ15-21292Y
    Institucionální podpora: RVO:68081723
    Klíčová slova: ODS steel * Plasticity * Stress relaxation * Dislocations
    Kód oboru RIV: JG - Hutnictví, kovové materiály
    Obor OECD: Materials engineering
    Impakt faktor: 3.414, rok: 2017

    The stress relaxation behavior of the ODM401 ODS steel is tested at the temperature range 400-800(circle)C in order to investigate the deformation mechanisms. The repeated relaxation tests are performed on the tensile specimens within the plastic strain range 10(-4)-10(-1). The deformation mechanisms are analyzed in terms of an activation volume, dislocation density and velocity, a thermal stress component and a strain rate hardening. The deformation is driven by the dislocation glide and climb. Dispersed particle-dislocation interactions is a dominant effect at temperatures 400-600(circle)C. Short-range interactions between dislocations and a lattice are most significant at 600(circle)C. The non-conservative motion of dislocations becomes-active at temperatures above 600(circle)C. The majority of the mobile dislocations is not trapped and is able to move freely in the microstructure.
    Trvalý link: http://hdl.handle.net/11104/0276037