The Cyclic Stress-Strain Curve of Polycrystals

Ole Bøcker Pedersen, K. V. Rasmussen, A. T. Winter

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The internal stresses implied by the Sachs model are estimated for individual PSBs at low plastic strain amplitudes and for homogeneously sheared grains at higher plastic strain amplitudes. The analysis shows that the Sachs model can account semi-quantitatively for experimentally measured cyclic stress-strain curves for copper. A similar approximative analysis of the Taylor model cannot account for the data. An interesting feature of the Sachs model is that, although it is assumed that the flow condition is entirely controlled by the PSBs. the predicted cyclic stress-strain curve displays an upward slope at high plastic strain amplitudes.
    Original languageEnglish
    JournalACTA METALLURGICA
    Volume30
    Issue number1
    Pages (from-to)57-62
    ISSN0001-6160
    DOIs
    Publication statusPublished - 1982

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