title: From dislocation junctions to forest hardening.
abstract: 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.
authors.affiliation: Laboratoire d'Etude des Microstructures, CNRS-ONERA, BP72, 92322 Châtillon Cedex, France.
authors.forename: R
authors.initials: R
authors.lastname: Madec
authors.forename: B
authors.initials: B
authors.lastname: Devincre
authors.forename: L P
authors.initials: LP
authors.lastname: Kubin