title: Dislocation cross-slip in nanocrystalline fcc metals.
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.
authors.affiliation: Materials Science & Simulation, ASQ/NUM, Paul Scherrer Insitut, Villigen PSI, Switzerland.
authors.forename: E
authors.initials: E
authors.lastname: Bitzek
authors.forename: C
authors.initials: C
authors.lastname: Brandl
authors.forename: P M
authors.initials: PM
authors.lastname: Derlet
authors.forename: H
authors.initials: H
authors.lastname: Van Swygenhoven