Abstract
A model of the accommodation mechanism of the formation of broken subboundaries has been studied by means of computer simulation. It is established that an increase in the power Ω of a disclination on a grain boundary leads to the activation of a source of dislocations in the grain volume, which results in the formation of a broken subboundary. The growth of Ω also leads to an increase in the subboundary misorientation θst, which (at every current moment of time) is approximately equal, on the one hand, to half of the disclination power (θst ≃ Ω/2) and, on the other hand, to the grain deformation ɛ.
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