Prediction of the critical strain in the Portevin-LeChatelier effect

R. Onodera, T. Morikawa

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    The critical (onset) strain εc of a serrated flow was predicted by phenomenological theory based on the strain-softening model. The critical strain predicted by the theory agreed quantitatively with experimental data. In particular, the theory could explain the relation between εc and strain rate ε: 3 ln εc=C+ln ε+E/RT without using the concept of a Cottrell atmosphere. Moreover, the increase in the critical strain for very small strain rates (the so-called type C serration) could also be simply explained by the theory.

    Original languageEnglish
    Pages (from-to)236-243
    Number of pages8
    JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    Volume65
    Issue number4
    DOIs
    Publication statusPublished - Jan 1 2001

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys
    • Materials Chemistry

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