Observation of a new dynamic recovery mechanism in the high strain regime

Tianbo Yu, Niels Hansen, Xiaoxu Huang, Andy Godfrey

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    Abstract

    Plastic deformation of metals refines the microstructure and increases the strength through work hardening, but this effect of deformation is counterbalanced by dynamic recovery. After deformation to large strains, the microstructure typically shows a lamellar morphology, with finely spaced lamellar boundaries connected by triple junctions. Here we report that mechanically assisted triple junction motion is an important mechanism of dynamic recovery, and it replaces two boundaries by one, while maintaining the structural morphology. The observation rationalizes many features of the evolution of microstructure and strength in metals deformed to large strains, including an approach to a steady state.
    Original languageEnglish
    JournalProceedings of the Risø International Symposium on Materials Science
    Volume35
    Pages (from-to)493-500
    ISSN0907-0079
    Publication statusPublished - 2014
    Event35th Risø International Symposium on Materials Science: New Frontiers of Nanometals - DTU, Risø Campus, Roskilde, Denmark
    Duration: 1 Sept 20145 Sept 2014
    Conference number: 35

    Conference

    Conference35th Risø International Symposium on Materials Science
    Number35
    LocationDTU, Risø Campus
    Country/TerritoryDenmark
    CityRoskilde
    Period01/09/201405/09/2014

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