POSSIBLE ROLE OF DEFORMATION-INDUCED POINT-DEFECTS IN DISLOCATION PATTERNING

The evolution of dislocation density is considered by taking into account the effect of deformationinduced point defects on the dislocation annihilation (recovery) rate. It is shown by linear stability analysis of the coupled equations describing the evolution of the dislocation density and the diffusion of point defects that a periodic spatial pattern can form during plastic deformation. The preferred wavelength of the emerging periodic structure is evaluated as a function of the production and annihilation bias parameters reflecting certain asymmetries in the generation and annihilation of interstitials and vacancies in the course of straining. Copyright © 1990 WILEY‐VCH Verlag GmbH & Co. KGaA