Orientation correlations in metal structures from the micrometer to nanometer range

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    Abstract

    Distributions of boundary misorientations in aluminium are measured as a function of deformation for strains up to 10. These experimental distributions are compared to misorientation distributions generated from a random mix of orientations present in the microstructure. It is found that for all strains investigated, the experimental distributions contain a significant higher fraction of low angle boundaries than that expected from the theoretically calculated distributions assuming a random mixing of orientations. This means that there are clear correlations between neighbouring orientations in the microstructure even after strains as large as 10. A similar analysis is done for annealed samples. Here it is found that conventional recrystallisation of a low strained sample leads to almost similar experimental and calculated distributions i.e. almost no correlations exist between neighbouring grains, whereas annealing a sample deformed to epsilon=10 leads to significant structural coarsening, but a large fraction of low angle boundaries are maintained in the experimental misorientation distribution, which is not seen in the theoretically calculated distribution.
    Original languageEnglish
    JournalSolid State Phenomena
    Volume101-102
    Pages (from-to)307-314
    ISSN1012-0394
    Publication statusPublished - 2005
    EventSymposium G, European Materials Research Society, Fall meeting 2003 - Warsaw, Poland
    Duration: 15 Sep 200319 Sep 2003

    Conference

    ConferenceSymposium G, European Materials Research Society, Fall meeting 2003
    CountryPoland
    CityWarsaw
    Period15/09/200319/09/2003

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