大島商船高等専門学校紀要

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大島商船高等専門学校紀要 Volume 43
published_at 2010-12

Study on the interaction between a dislocation and impurities Part XIV : Dependence of the effective stress due to impurities on the shear strain in KCl single crystals doped with monovalent impurities

転位と不純物との相互作用に関する研究 (14) : KCl 単結晶中の1 価不純物の有効応力に及ぼす歪の影響
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Descriptions
The phenomenon that the effective stress (τp1) due to the impurities decreases with increasing shear strain was observed at almost all the temperatures for KCl:Na+ (NaCl 0.5 mol% in the melt). On the other hand, it could not be discerned for KCl:Li+ (LiCl 0.5 mol% in the melt). Accordingly, the critical temperature, at which the effective stress is zero, is larger in stage Ⅰ of stress-strain curve, compared with that in stage Ⅱ. Furthermore, the value of τp0 , the effective stress due to the impurities without thermal activation, in stage Ⅰ is slightly larger than that in stage Ⅱ for KCl:Na+.
Creator Keywords
effective stress due to impurities
critical temperature
plastic deformation