Abstract
The atomic mechanism of
diffusion over low-angle twist boundaries (100), (110), (111) in fcc metals Ni, Cu,
Al is studied by the method of molecular dynamics. It was shown that
self-diffusion over twist grain boundaries took place by the formation of the
chains of displaced atoms along the nuclei of screw grain boundary
dislocations, initiated, as a rule, near knots of dislocation net.
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