Temperature dependence of activation enthalpy for yielding in bimodal Ti6Al4V

Bhargavi Rani Anne, Masaki Tanaka, Tatsuya Morikawa

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Mechanical properties relating to the thermally activated process of yielding was investigated in Ti6Al4V with a bimodal microstructure, consisting of both primary alpha grains and lamellar colonies of secondary alpha/beta lamellae. The temperature dependence of yield stress, effective stress, activation volume, and activation enthalpy were investigated between 77 K and 650 K. The yield stress and effective stress decreased with increasing temperature. It was found that the temperature dependence of activation enthalpy for yielding shows values between those obtained from basal slips and prismatic slips investigated in single crystalline α-titanium. This suggests that the thermally activated processes which control the yielding of bimodal Ti6Al4V is the combination of basal and prismatic slips.

    Original languageEnglish
    Pages (from-to)1828-1832
    Number of pages5
    JournalMaterials Transactions
    Issue number9
    Publication statusPublished - Jan 1 2019

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


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