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

DOI Web Site 被引用文献1件 参考文献12件
  • Nishi Tsuyoshi
    Graduate School, Department of Materials Processing, Tohoku University
  • Shibata Hiroyuki
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Tsutsumi Koichi
    Materials and Processing Research Center, NKK Corporation
  • Ohta Hiromichi
    Department of Materials Science, Ibaraki University
  • Waseda Yoshio
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

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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.

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