Defect based micromechanical modelling and simulation of nanoSPD CP-Ti in post-deformation

L Zeipper (Korresp. Autor*in), Michael Zehetbauer (Korresp. Autor*in), Christian Holzleithner

    Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

    Abstract

    The paper concerns the dislocation based modelling and simulation of room temperature post-compression hardening after warm equal channel angular processing (ECAP) of grade 2 CP-Ti. The post-deformation behaviour is well simulated by the Zehetbauer model which already succeeded in describing the evolution of strength and structural parameters during conventional and severe plastic deformation. The model yields excellent fits to the experimental post-compression hardening characteristics (stages II, III and IV) as well as to the evolution of dislocation density. The physical quantities involved in the resulting fit parameters take reasonable values. In particular, the calculations yield a satisfactory agreement with the experimentally gained data of the cell size and the concentration of lattice vacancies, as it is shown by comparisons with X-ray profile investigations and measurements of residual electrical resistivity. As a difference to previous modelling of large strain hardening, edge dislocation density saturates at smaller strains than screw density which seems to be a consequence of the much finer initial grain structure and of the elevated ECAP deformation temperature. Œ 2005 Elsevier B.V. All rights reserved.
    OriginalspracheEnglisch
    Seiten (von - bis)217-221
    Seitenumfang5
    FachzeitschriftMaterials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
    Jahrgang410-411
    AusgabenummerSI
    DOIs
    PublikationsstatusVeröffentlicht - 2005

    ÖFOS 2012

    • 103018 Materialphysik

    Fingerprint

    Untersuchen Sie die Forschungsthemen von „Defect based micromechanical modelling and simulation of nanoSPD CP-Ti in post-deformation“. Zusammen bilden sie einen einzigartigen Fingerprint.

    Zitationsweisen