Počet záznamů: 1

Study of thermal stability of ultrafine-grained copper by means of electron back scattering diffraction

  1. 1.
    0353414 - UFM-A 2011 RIV JP eng J - Článek v odborném periodiku
    Man, O. - Pantělejev, L. - Kunz, Ludvík
    Study of thermal stability of ultrafine-grained copper by means of electron back scattering diffraction.
    Materials Transactions. Roč. 51, č. 2 (2010), s. 209-213 ISSN 1345-9678
    Grant CEP: GA AV ČR 1QS200410502
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: ultra-fine grained copper * thermal stability of microstructure * electron back scattering diffraction * grain size * texture
    Kód oboru RIV: JG - Hutnictví, kovové materiály
    Impakt faktor: 0.779, rok: 2010

    Thermal stability of ultrafine-grained (UFG) structure of 99.9% pure copper produced by eight equal channel angular pressing (ECAP) passes was studied. The annealing experiments were conducted at 180°C. The dwell times were in the range of 10 to 120 min. The electron backscattering diffraction (EBSD) analyses were performed before and after annealing at exactly the same area in order to quantify the degree of decomposition of the UFG structure. Definition of grain boundaries was based on the misorientation angle of 1°. More advanced analysis of the EBSD results based on a kernel average misorientation (KAM) parameter was performed. Inverse pole figure maps did not reveal any substantial changes of UFG microstructure due to annealing. Some shift in the KAM modus in comparison with the initial state was observed but its magnitude was found negligible. Also changes in texture were found to be minor. On the other hand the microhardness increases with increasing time of annealing.
    Trvalý link: http://hdl.handle.net/11104/0192669