Through-Thickness Variations of Deformed and Annealed Microstructures in ECAE-Processed Copper

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    Abstract

    Through-thickness variations of the microstructure in copper processed using equal channel angular extrusion (ECAE) to a strain of ~10 without rotations between passes have been investigated in deformed and partially recrystallized conditions. It is found that the through-thickness heterogeneity in the deformed sample follows the distribution of strain imposed by ECAE, where lower strain is imparted to the material that passes through the outer die corner. Also, the macroscopic distribution of recrystallized grains as a function of depth in the billet is found to be in correspondence to the applied strain. Compared to other inspected layers the bottom part of the billet was less refined after ECAE and remained less recrystallized after annealing.
    Original languageEnglish
    JournalMetallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
    Volume40
    Issue number7
    Pages (from-to)1684-1692
    ISSN1073-5623
    DOIs
    Publication statusPublished - 2009

    Keywords

    • Materials research
    • Light strong materials for wind turbines and for transportation

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