Thermal diffusivity measurement of 2.25Cr-1Mo steel with internal friction |
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Authors: | Xinbao Liu Mitsuharu Shiwa Kota Sawada Hisashi Yamawaki Makoto Watanabe |
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Affiliation: | Non-Destructive Evaluation Group, National Institute for Materials Science, Tsukuba 305-0047, Japan |
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Abstract: | In this work, the internal friction of 2.25Cr-1Mo steel measured on a dynamic mechanical analyzer (DMA) was used to evaluate its thermal diffusivity at elevated temperatures. With the dual cantilever clamp, the internal friction of 2.25Cr-1Mo steel at high temperatures was obtained, which was mainly composed of the thermoelastic relaxation with a peak of 15 Hz and the broad spectrum of relaxation processes especially at low frequencies. According to the deconvolution of these results, the thermoelastic internal friction of 2.25Cr-1Mo steel at high temperatures was achieved. Then, the thermal diffusivity of 2.25Cr-1Mo steel at high temperatures was quantitatively estimated, which confirmed the validity of present method. |
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Keywords: | 2.25Cr-1Mo steel Thermal diffusivity Thermoelastic relaxation Internal friction |
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