The objective of this study was to identify the microstructural mechanisms controlling Omega precipitates' contribution to the high strength and ductility of Al-Cu-Mg-Ag alloys subjected to high impact loading conditions. Three interrelated approaches were used: (i) HRTEM imaging of deformed Omega precipitates in ballistically impacted Al-Cu-Mg-Ag plates, (ii) microstructurally based finite element (FE) analysis based on specialized crystalline plasticity formulations, and (iii) molecular dynamics (MD) simulations of dislocation nucleation and emission. The FE and MD simulations detail the evolution of dislocation densities and dislocations at the Al/Omega interface, which are consistent with the experimentally observed multiplicity of shear cutting of thin Omega precipitates. Furthermore, the FE results indicate that unrelaxed tensile strains at the Al/Omega interface can inhibit localized deformation in the alloy.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Deformation mechanisms of an Omega precipitate in a high-strength aluminum alloy subjected to high strain rates


    Weitere Titelangaben:

    Deformationsmechanismen eines Omega-Präzipitates in einer hochfesten Aluminiumlegierung, die hoher Verformungsgeschwindigkeit ausgesetzt ist


    Beteiligte:
    Elkhodary, K. (Autor:in) / Lee, W. (Autor:in) / Sun, L.P. (Autor:in) / Brenner, D.W. (Autor:in) / Zikry, M.A. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2011


    Format / Umfang :

    11 Seiten, 12 Bilder, 2 Tabellen, 35 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Constitutive Modeling of Polymers Subjected to High Strain Rates

    Crandall, Jeff R. / Martin, Peter G. | SAE Technical Papers | 2001


    Constitutive modeling of polymers subjected to high strain rates

    Martin,P.G. / Crandall,J.R. / Univ.of Virginia,US | Kraftfahrwesen | 2001


    Aluminum-Alloy Castings, High Strength

    SAE Technical Papers | 2017


    High-strength aluminum alloy hub

    RUAN JIZHONG | Europäisches Patentamt | 2020

    Freier Zugriff

    Aluminum-Alloy Castings, High Strength

    SAE Technical Papers | 2011