Temperature dependence of effective stress in severely deformed ultralow-carbon steel

Masaki Tanaka, Kenji Higashida

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    The effects of severe plastic deformation on the thermal activation of dislocation gliding in ultralow-carbon steel at low temperatures were investigated. This was done by measuring the temperature dependences of the effective stress, activation volume and activation energy. It was found that the values of all these parameters were lower than those for coarse-grained specimens at low temperatures. In coarse-grained materials, the activation energy should increase with a decrease in the effective stress. This phenomenon, which seemed counterintuitive initially, could be physically interpreted on the basis of the fluctuation in the athermal stress.

    Original languageEnglish
    Pages (from-to)1979-1992
    Number of pages14
    JournalPhilosophical Magazine
    Volume96
    Issue number19
    DOIs
    Publication statusPublished - Jul 2 2016

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

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