Mechanism of toughening in ferritic iron by solute copper at low temperature

Junaidi Syarif, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)


    The ductile-to-brittle transition (DBT) and plastic deformation behaviors were investigated in Fe-(0-2)mass%Cu alloys to understand the effect of solute Cu on the mechanical properties of ferritic iron. The DBT temperature of ferritic iron in Charpy impact test was lowered by the solute Cu although the hardness at room temperature was increased owing to solid solution hardening. Tensile tests revealed that the yield stress of the Fe-1mass%Cu alloy becomes smaller than that of the Fe-Omass%Cu alloy in the temperature range below 223 K through solid solution softening by Cu. The solid solution softening makes slip deformation easy to occur even at such a lower temperature and also at high strain rate. This leads to suppressing twin deformation which induces brittle fracture of ferritic iron at low temperature, and resulting in the shift of DBT temperature to lower side.

    Original languageEnglish
    Pages (from-to)1100-1104
    Number of pages5
    Journalisij international
    Issue number7
    Publication statusPublished - 2003

    All Science Journal Classification (ASJC) codes

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry


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