Abstract
The time dependence of solute drift to an edge dislocation dipole is calculated for a dislocation-solute atom interaction characterized by the first-order size effect. It is found that the rate of solute arrival to dislocations at constant temperature is proportional to the square root of the recovery time, t, in contrast to the t 2 3 behavior characteristic of single straight edge dislocations as sinks. This effect can be a significant influence on solute segregation to extended dislocations, since an extended screw dislocation has a first order size effect interaction with a solute atom which is of the same form as the dipole considered. Thus t 1 2 kinetics are characteristic of solute drift to extended screw dislocations as well.
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