From dislocation junctions to forest hardening.
The mechanisms of dislocation intersection and strain hardening in fcc crystals are examined with emphasis on the process of junction formation and destruction. Large-scale 3D simulations of dislocation dynamics were performed yielding access for the first time to statistically averaged quantities. These simulations provide a parameter-free estimate of the dislocation microstructure strength and of its scaling law. It is shown that forest hardening is dominated by short-range elastic processes and is insensitive to the detail of the dislocation core structure.
Madec
R
R
Laboratoire d'Etude des Microstructures, CNRS-ONERA, BP72, 92322 Châtillon Cedex, France.
Devincre
B
B
Kubin
L P
LP