Stationary Propagation of Kink in Dislocation

概要

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Motion of a kink in a dislocation is analysed as a function of viscous resistanceforce and of an applied stress. On the basis of the string model for dislocation,the motion of kink is determined by a wave equation in terms of line energy,the Peierls force, a viscous resistance force and an applied stress. The numericalsolution of the wave equation shows that the motiott of kink under the viscousresistance force becomes soon stationary: The kink propagates in a difinite formand at a constant velocity nearly independent of an initial condition. The propaga-lion velocity is proportional to the external stress when the viscous resistance isproportional to the real velocity of the lattice ions produced by the propagationof the kink, and is proportional to the square root of the external stress when theviscous resistance is proportional to the square of the real velocity.
社団法人日本物理学会の論文
1979-09-15