Dislocation cross-slip in nanocrystalline fcc metals.
Phys Rev Lett
; 100(23): 235501, 2008 Jun 13.
Article
em En
| MEDLINE
| ID: mdl-18643514
ABSTRACT
Constant strain rate molecular dynamics simulations of nanocrystalline Al demonstrate that a significant amount of dislocations that have nucleated at the grain boundaries, exhibit cross-slip via the Fleischer mechanism as they propagate through the grain. The grain boundary structure is found to strongly influence when and where cross-slip occurs, allowing the dislocation to avoid local stress concentrations that otherwise can act as strong pinning sites for dislocation propagation.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article