Influence of stacking fault energy on deformation mechanism and dislocation storage capacity in ultrafine-grained materials

Z. W. Wang, Y. B. Wang, X. Z. Liao, Y. H. Zhao, E. J. Lavernia, Y. T. Zhu, Z. Horita, T. G. Langdon

    Research output: Contribution to journalArticlepeer-review

    122 Citations (Scopus)

    Abstract

    Partial dislocation emission from grain boundaries in metals with medium-to-high stacking fault energies is observed primarily in the grain size range of a few tens of nanometers. Here we report that a reduction in the stacking fault energy permits the emission of partial dislocations from grain boundaries in ultrafine-grained materials with grain sizes significantly larger than 100 nm and this produces twinning. Such twins are effective in increasing the dislocation storage capacity, which may be used to improve the ductility.

    Original languageEnglish
    Pages (from-to)52-55
    Number of pages4
    JournalScripta Materialia
    Volume60
    Issue number1
    DOIs
    Publication statusPublished - Jan 2009

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys

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