Workhardening correlations based on state variables in some FCC metals in monotonic loading

M. A. Korhonen*, S. P. Hannula, Che Yu Li

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)

    Abstract

    This paper reports an investigation of the workhardening properties of 316 stainless steel, commercial purity aluminum, and OFHC copper at room temperature by using a state-variable approach. Based on the results of experiments, it is proposed that a generalized workhardening correlation can be formulated by using two state variables only, the structural state parameter and the inelastic strain rate. Particularly, an absolute workhardening coefficient is proposed to be a product of two parts. The athermal part, which is structure dependent only, will be approached at low homologous temperatures and/or high strain rates, while the strain rate sensitive part describes a dynamic recovery contribution at high homologous temperatures and/or low strain rates. Correspondingly, based on this approach a new way of separating thermal and athermal contributions to workhardening rate are suggested. Moreover, it is shown that a single master curve can be constructed to display the dependence of workhardening coefficient on structure and strain rate.

    Original languageEnglish
    Pages (from-to)411-420
    Number of pages10
    JournalMetallurgical transactions A - Physical Metallurgy and Materials Science
    Volume16
    Issue number3
    DOIs
    Publication statusPublished - Mar 1985
    MoE publication typeA1 Journal article-refereed

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