Calculations of sink strength and bias for point-defect absorption by dislocations in arrays

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Abstract
Calculations of sink strength and bias are presented for arrays of edge dislocations constituting low-angle grain boundaries or deviations from perfect coincidence misorientations in high-angle grain boundaries. It is shown that the sink strength of an array increases as the dislocation spacing decreases: this also causes a strong decline in the bias. If a given Burgers vector content is arranged as a finer array of dislocations of smaller Burgers vectors, the resulting sink strength is higher and the bias lower.