Počet záznamů: 1  

Characterization of the matrix-twin interface of a (1 0 -1 2) twin during growth

  1. 1. 0431981 - UFM-A 2015 RIV GB eng J - Článek v odborném periodiku
    Ostapovets, Andriy - Serra, A.
    Characterization of the matrix-twin interface of a (1 0 -1 2) twin during growth.
    Philosophical Magazine. Roč. 94, č. 25 (2014), s. 2827-2839. ISSN 1478-6443
    Grant CEP: GA MŠk(CZ) EE2.3.30.0063
    Grant ostatní:Catalan Government(ES) AGAUR2014SGR 1644; Spanish Secretariat of Research, Development and Innovation(ES) FIS2012-39433-C02-02
    Institucionální podpora: RVO:68081723
    Klíčová slova: twinning * twin boundaries * disconnections
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus; BM - Fyzika pevných látek a magnetismus (FZU-D)

    A model of twin growth in magnesium is presented together with the analysis of defects responsible for this growth. The twin interface is represented by {10-12} and basal-prismatic facets. Disclinations are situated in the facet junctions creating dipoles superimposed on basal-prismatic and conjugate twin facets. The migration of facets is mediated by the conservative motion of interfacial disconnections. The {10-12} interfaces contain b2/2 twinning disconnections. The facet junctions serve as sources and sinks for these defects. Two types of disconnections (bbp1/1 and bbp2/2) were observed in basal-prismatic boundary. The dipoles of bbp1/1 disconnections were nucleated in the vicinity of existing defects of this type. Interaction of this dipole with existing bbp1/1 leads to the creation of a bbp2/2 disconnection, which is later absorbed in the facet junction. The nucleation of bbp2/2 dipoles was not observed. In twin embryo growth, the basal-prismatic segments remain coherent with a fixed length,while the twin segments grow indefinitely
    Trvalý link: http://hdl.handle.net/11104/0236497