Abstract

It is verified that the electrostatic interaction between dislocations and divalent cation–cation vacancy dipoles gives the same kind of dependence on temperature, effective stress, and dislocation velocity as those deduced from the elastic interaction between dislocations and tetragonal defects. It is observed that if the temperature remains constant when the stresses are low the relationship between stress and dislocation velocity can be approximated by a simple exponential relation and when the stresses are higher it follows a potential expression, as deduced empirically by Gilman and Johnston. Il a été vérifié que l'interaction électrostatique entre les dislocations et les dipoles cation divalent—vacante de cation donne le měme type de dépendance entre la température et la vitesse des dislocations que celles déduites de l'interaction entre dislocations et défauts tétragonaux. On a observé que si la température demeure constante quand les efforts sont faibles, la relation entre l'effort et la vitesse des dislocations peut etre approchée par une simple relation exponentielle et quand les efforts sont plus importants il existe une expression de puissance comme celle qui a été déduite empiriquement par Gilman et Johnston.

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