Observation of a New Mechanism Balancing Hardening and Softening in Metals

Tianbo Yu, Niels Hansen, Xiaoxu Huang, Andy Godfrey

    Research output: Contribution to journalJournal articleResearchpeer-review

    282 Downloads (Pure)

    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 large strain, 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 contributor to dynamic recovery, leading to an almost steady state. Triple junction motion replaces two boundaries by one, while maintaining the structural morphology. The observation rationalizes both a decreasing work hardening rate and the approach to a dynamic equilibrium of structural refinement at large strains.
    Original languageEnglish
    JournalMaterials Research Letters
    Volume2
    Issue number3
    Pages (from-to)160–165
    ISSN2166-3831
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Microstructure
    • Plastic Deformation
    • Work Hardening
    • Dynamic Recovery
    • Triple Junction

    Fingerprint

    Dive into the research topics of 'Observation of a New Mechanism Balancing Hardening and Softening in Metals'. Together they form a unique fingerprint.

    Cite this