Experimental and computational studies of competitive precipitation behavior observed in microstructures with high dislocation density and ultra-fine grains

Tetsuya Masuda, Shoichi Hirosawa, Zenji Horita, Kenji Matsuda

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    The competitive precipitation behavior observed in microstructures with high dislocation density and ultra-fine grains has been studied experimentally and computationally for cold-rolled and severe plastic deformed Al-Mg-Si alloy. The age-hardenability at 443K was reduced by the two deformation processes due to the accelerated formation of larger precipitates on dislocations and grain boundaries, in place of the transgranular precipitation of refined β" in the matrix. The developed numerical model based on the classical heterogeneous nucleation theory clarified the dislocation density and grain size dependences of the volume fraction of precipitates nucleated at different sites, in good agreement with experimental results. It could be therefore possible that three strengthening mechanisms of strain hardening, hardening by grain refinement and precipitation hardening are optimally exploited according to the computationally estimated dependences.

    Original languageEnglish
    Title of host publicationTHERMEC 2011
    PublisherTrans Tech Publications Ltd
    Pages1787-1792
    Number of pages6
    ISBN (Print)9783037853030
    DOIs
    Publication statusPublished - 2012
    Event7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC, Canada
    Duration: Aug 1 2011Aug 5 2011

    Publication series

    NameMaterials Science Forum
    Volume706-709
    ISSN (Print)0255-5476
    ISSN (Electronic)1662-9752

    Other

    Other7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
    Country/TerritoryCanada
    CityQuebec City, QC
    Period8/1/118/5/11

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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