Thermally Activated Deformation of KCl and KCl–KBr Single Crystals at Low Temperatures between 1.8 and 70 K
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概要
- 論文の詳細を見る
The critical-resolved shear stress and the strain-rate dependence of flow stress for KCl pure crystals and KCl-1, 4, 22 and 48 mol% KBr solid-solution crystals were measured over a temperature range between 1.8 K and 70 K. The activation analyses of the results showed that an Arrhenius rate equation for plastic deformation appeared to hold above 15 K for KCl and KCl-1 and 4 mol% KBr and above 25 K for KCl-22 and 48 mol% KBr, but not below these temperatures. Such discrepancy of the Arrhenius rate equation has been interpreted by the fluctuation of activation enthalpy due to random distribution of solute atoms. In the present interpretation the pre-exponential factor of the Arrhenius rate equation should have a strong temperature-dependence, especially in the low-temperature range, which agrees well with experimental results.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 1989-07-20
著者
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Azuma Kensaku
Department Of Precision Engineering Faculty Of Engineering Osaka University
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Yamada Tomoharu
Department Of Precision Engineering Faculty Of Engineering Osaka University
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Kataoka Toshihiko
Department Of Precision Engineering Faculty Of Engineering Osaka University
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Sumida Takashi
Department of Precision Engineering, Faculty of Engineering, Osaka University, Suita, Osaka 565
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Kataoka Toshihiko
Department of Precision Engineering, Faculty of Engineering, Osaka University, Suita, Osaka 565
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- Thermally Activated Deformation of KCl and KCl–KBr Single Crystals at Low Temperatures between 1.8 and 70 K