Measurement of Thermal Diffusivity of Steels at Elevated Temperature by a Laser Flash Method

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著者

    • NISHI Tsuyoshi
    • Graduate School, Department of Materials Processing, Tohoku University
    • SHIBATA Hiroyuki
    • Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
    • WASEDA Yoshio
    • Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

抄録

In order to obtain thermal diffusivity of steels at elevated temperature with sufficient reliability using a laser flash method, an accurate value of specimen thickness is essentially required. Accordingly, a linear thermal expansion coefficient of steels was systematically measured in the temperature range from room temperature to 1 676 K. Since the decrease in specimen thickness was detected after the measurement of thermal diffusivity under vacuum at high temperature close to solidus, such a factor was quantitatively estimated from the thickness values of quenched specimens. Combining these two results, the thermal diffusivity values were successfully determined for ultra low carbon, low carbon, medium carbon, 1.2% silicon, 9% nickel and 13 % chromium steels in the temperature range from room temperature to 1676 K using the laser flash method.

収録刊行物

  • ISIJ international

    ISIJ international 42(5), 498-503, 2002-05-15

    一般社団法人 日本鉄鋼協会

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