Prediction and experimental validation of cooling rate dependence of viscoplastic properties in a partially solidified state of Al-5 mass%Mg Alloy

Rei Hirohara, Yasutaka Kawada, Ryosuke Takai, Mitsuhiro Otaki, Toshimitsu Okane, Makoto Yoshida

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    To predict hot tearing in direct chill (DC) casting and shape casting of aluminum alloys using thermal stress analysis, cooling rate dependence of viscoplastic properties in a partially solidified state is indispensable. Based on viscoplastic properties determined from experiments, this study develops a method to predict the temperature dependence of viscoplastic properties at an arbitrary cooling rate through the Clyne-Kurz microsegregation model. For validation of the developed method, tensile tests were performed on Al-5 mass%Mg alloy in a partially solidified state at three cooling rates. Results show good agreement between the predicted values and experimentally obtained values, which demonstrates that the developed method is effective for predicting the cooling rate dependence of viscoplastic properties.

    Original languageEnglish
    Pages (from-to)1299-1307
    Number of pages9
    JournalMaterials Transactions
    Volume58
    Issue number9
    DOIs
    Publication statusPublished - 2017

    Fingerprint

    Cooling
    cooling
    predictions
    Casting
    tearing
    stress analysis
    tensile tests
    thermal stresses
    Stress analysis
    Thermal stress
    aluminum alloys
    Aluminum alloys
    temperature dependence
    Experiments
    Temperature

    Keywords

    • Constitutive behavior
    • Hot tearing
    • Microsegregation
    • Semi-solid
    • Viscoplasticity

    ASJC Scopus subject areas

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

    Cite this

    Prediction and experimental validation of cooling rate dependence of viscoplastic properties in a partially solidified state of Al-5 mass%Mg Alloy. / Hirohara, Rei; Kawada, Yasutaka; Takai, Ryosuke; Otaki, Mitsuhiro; Okane, Toshimitsu; Yoshida, Makoto.

    In: Materials Transactions, Vol. 58, No. 9, 2017, p. 1299-1307.

    Research output: Contribution to journalArticle

    Hirohara, Rei ; Kawada, Yasutaka ; Takai, Ryosuke ; Otaki, Mitsuhiro ; Okane, Toshimitsu ; Yoshida, Makoto. / Prediction and experimental validation of cooling rate dependence of viscoplastic properties in a partially solidified state of Al-5 mass%Mg Alloy. In: Materials Transactions. 2017 ; Vol. 58, No. 9. pp. 1299-1307.
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    AU - Takai, Ryosuke

    AU - Otaki, Mitsuhiro

    AU - Okane, Toshimitsu

    AU - Yoshida, Makoto

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