Nucleation and migration of high angle grain boundaries in bilayer foils II: Migration
1980; Elsevier BV; Volume: 74; Issue: 2 Linguagem: Inglês
10.1016/0040-6090(80)90090-5
ISSN1879-2731
AutoresC.R.M. Grovenor, Duncan Smith, M. J. Goringe,
Tópico(s)Force Microscopy Techniques and Applications
ResumoSpecimens similar to those studied in Part I were heated to study further the migration mechanisms of high angle grain boundaries through misfit dislocation arrays. The change in misorientation across the migrating grain boundaries was found to depend on the efficiency with which the misfit dislocations are absorbed by the boundary. Further observations show that this change in misorientation can result in a decrease in boundary mobility, followed by the nucleation of a twin-related grain from the original grain boundary. The twinning process will continue until a mobile grain boundary is produced; a simple mechanism for this twinning process is proposed.
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