On dislocation reactions and hardening mechanisms in 3D dislocation dynamics
A 3D dislocation dynamics (DD) model for plastic deformation, which connects the macroscopic mechanical properties to the basic physical laws that govern dislocation mobility and related interaction mechanisms, has been under development. In this model there is a set of critical reactions that, basically, determine the overall results of the simulations. These reactions are annihilation, formation of jobs, junctions, dipoles, and cross-slip. In this paper the authors discuss these reactions and the manner in which they influence the predicted stress-strain behavior in bcc metals. In particular, the formation (zipping) and strength of dipoles and junctions, and effect of jogs, using the dislocation dynamics model are examined. The strengths (unzipping) of these reactions for various configurations are determined by direct evaluation of the elastic interaction forces.
- Research Organization:
- Washington State Univ., Pullman, WA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 20014956
- Resource Relation:
- Conference: Multiscale Modeling of Materials, Boston, MA (US), 11/30/1998--12/03/1998; Other Information: Single article reprints are available through University Microfilms Inc., 300 North Zeeb Rd., Ann Arbor, Michigan 48106 (US); PBD: 1999; Related Information: In: Multiscale modeling of materials. Materials Research Society symposium proceedings: Volume 538, by Bulatov, V.V.; Diaz de la Rubia, T.; Phillips, R.; Kaxiras, E.; Ghoniem, N. [eds.], 607 pages.
- Country of Publication:
- United States
- Language:
- English
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