Počet záznamů: 1  

Dynamic restoration of severely predeformed, ultrafine-grained pure Cu at 373 K observed in situ

  1. 1.
    0482058 - UFM-A 2018 RIV US eng J - Článek v odborném periodiku
    Král, Petr - Blum, W. - Dvořák, Jiří - Eisenlohr, P. - Petrenec, M. - Sklenička, Václav
    Dynamic restoration of severely predeformed, ultrafine-grained pure Cu at 373 K observed in situ.
    Materials Characterization. Roč. 134, DEC (2017), s. 329-334. ISSN 1044-5803
    Grant CEP: GA MŠk(CZ) LQ1601
    Institucionální podpora: RVO:68081723
    Klíčová slova: ECAP * Dynamic grain coarsening * UFG copper * In situ
    Kód oboru RIV: JG - Hutnictví, kovové materiály
    Obor OECD: Materials engineering
    Impakt faktor: 2.892, rok: 2017

    Microstructure changes of ultrafine-grained pure copper prepared by equal-channel angular pressing were investigated during in situ tensile testing inside a scanning electron microscope at constant total strain rate of 10-4 s-1 at 373 K (~ 0.28 Tm). After fast work hardening the flow stress saturated at an inelastic strain of 0.06. Significant local coarsening of grains was observed to start at about 2/3 of the maximum flow stress. However, these localized events did not significantly change the mean grain size up to an inelastic strain of 0.09. Surface observations showed that the coarsening was preferentially located at shear bands.
    Trvalý link: http://hdl.handle.net/11104/0277460