Microstructural evolution in rolled aluminium

B. Bay, N. Hansen, D. Kuhlmann-Wilsdorf

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The evolution of the microstructure of cold-rolled pure aluminium (99.996%) was studied by transmission electron microscopy (TEM), extending a previous study that was limited to 30% strain (ε = 0.36). The present work concentrates on rolling strains from 50% (ε = 0.69) to 90% (ε = 2.3). The observations are explained through the governing principle that, in the course of polyslip, grains break up into volume elements within each of which fewer slip systems operate simultaneously than required by the Taylor model. The boundaries between the volume elements accommodate the lattice misorientations arising from the correspondingly different glide. They are therefore geometrically necessary boundaries and in TEM they appear variously as dense dislocation walls, different types of microbands and subgrain boundaries. The morphology and the spatial arrangement of the geometrically necessary boundaries were characterized and it is discussed how these boundaries form with increasing strain as an integral part of the microstructural evolution.
    Original languageEnglish
    JournalMaterials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing
    Volume158
    Issue number2
    Pages (from-to)139-146
    ISSN0921-5093
    DOIs
    Publication statusPublished - 1992

    Fingerprint

    Dive into the research topics of 'Microstructural evolution in rolled aluminium'. Together they form a unique fingerprint.

    Cite this