Computer simulation of Portevin-LeChatelier effect based on strain softening model

R. Onodera, T. Morikawa, K. Higashida

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)


    A new phenomenological theory for the Portevin-LeChatelier effect is proposed. The theory is based on an unknown internal stress Yir which decreases with strain (work softening) and increases with time (age hardening). Yir is introduced to satisfy the negative rate sensitivity (n.r.s.) of flow stress and it is supposed to be due to very fine clusters which are cut by dislocation and restored by solute atom diffusion. Almost all constants used in the theory can be determined by tensile test. The results of simulation can explain the effect of temperature, strain and strain rate on the onset strain of P-L effect. Especially, the model can explain the no-occurrence of P-L effect under the n.r.s. condition in aged Al-Cu alloy, and the quantity of transition strain in tensile test in which the crosshead speed is abruptly changed.

    Original languageEnglish
    Pages (from-to)533-536
    Number of pages4
    JournalMaterials Science and Engineering: A
    Publication statusPublished - Aug 30 1997

    All Science Journal Classification (ASJC) codes

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


    Dive into the research topics of 'Computer simulation of Portevin-LeChatelier effect based on strain softening model'. Together they form a unique fingerprint.

    Cite this