Effect of Nonrandomly Dispersed Particles on Austenite Grain Growth in Fe-10mass%Ni and Fe-0.20mass%C-0.02mass%P Alloys

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著者

    • OHTA Hiroki
    • Institute for Multidisciplinary Research for Advanced Materials, Tohoku University
    • SUITO Hideaki
    • Institute for Multidisciplinary Research for Advanced Materials, Tohoku University

抄録

The fraction of deoxidation particles of MgO, ZrO<sub>2</sub> and Ce<sub>2</sub>O<sub>3</sub> on austenite grain boundaries in an Fe–10mass%Ni or Fe–0.20mass%C–0.02mass%P alloy has been measured as a function of dissolved Ce content. The fraction of particles on grain boundaries, Φ<sub>A</sub>, which is defined by the ratio of the number of particles at the grain boundaries per unit area and the number of particles at the grain boundaries and the interior of the grain per unit area and the Φ<sub>A</sub> value at random dispersion, Φ<sub>R(2-D)</sub>, attend the steady state within 60 min holding at 1 673 K. The Φ<sub>A</sub> and Φ<sub>R(2-D)</sub> values increase with the addition of very small amount of dissolved Ce and thereafter are independent of dissolved Ce content. The <i>D</i><sub>A</sub>/<i>d</i><sub>A</sub> (limiting mean grain diameter/mean particle diameter) ratios decrease with an increase in Φ<sub>A</sub> for a given volume fraction of particles.

収録刊行物

  • ISIJ international  

    ISIJ international 46(6), 832-839, 2006-06-15 

    The Iron and Steel Institute of Japan

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