TITLE

Dislocation structures of Σ3 {112} twin boundaries in face centered cubic metals

AUTHOR(S)
Wang, J.; Anderoglu, O.; Hirth, J. P.; Misra, A.; Zhang, X.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p021908
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
High resolution transmission electron microscopy of nanotwinned Cu films revealed Σ3 {112} incoherent twin boundaries (ITBs), with a repeatable pattern involving units of three {111} atomic planes. Topological analysis shows that Σ3 {112} ITBs adopt two types of atomic structure with differing arrangements of Shockley partial dislocations. Atomistic simulations were performed for Cu and Al. These studies revealed the structure of the two types of ITBs, the formation mechanism and stability of the associated 9R phase, and the influence of stacking fault energies on them. The results suggest that Σ3 {112} ITBs may migrate through the collective glide of partial dislocations.
ACCESSION #
43277356

 

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