A Portevin-Le Chatelier Effect expected from Solute Atmosphere Dragging

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概要

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• A solute atmosphere, will be formed round a moving dislocation in a solid solution, when the dislocation velocity is smaller than the critical value ν_<CL> = AD/kTb'2 for the case of solute atoms interacting hydrostatically with an edge dislocation, where A is a parameter indicating the strength of the interaction, b' is a distance of the order of the interatomic one, and the other parameters have their usual meanings. There may exist another critical velocity (Cottrell 1953a), ν_<CH>, which corresponds to the maximum drag stress due to the solute atmosphere. In the range of ν_<CH><ν<ν_<CL>, a moving dislocation will be subjected to a lower dragging stress with higher velocity. A kind of Portevin-Le Chatelier effect is expected from this dynamical instability of plasticity.

著者

• Morozumi S.

  The Research Institute For Iron Steel And Other Metals

• YOSHINAGA H.

  The Research Institute for Iron, Steel and Other Metals

• Yoshinaga H.

  The Research Institute For Iron Steel And Other Metals

関連論文

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• {1122} Slip System in Magnesium
• The Portevin-Le Chatelier Effect in Vanadium
• The Solute Atmosphere Round a Moving Dislocation and its Dragging Stress

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