Grain-Boundary Shear-Migration Coupling in Al Bicrystals. Atomistic Modeling
- Russian Academy of Sciences, Mikheev Institute of Physics of Metals, Ural Branch (Russian Federation)
The energy of grain boundary shears is calculated for symmetric grain boundaries (GBs) using ab initio methods and molecular-dynamic modeling in order to elucidate mechanisms that control GB shear-migration coupling in typical symmetric GBs, such as Σ3 (111), Σ5 (012), Σ5 (013) and Σ11 (113) tilt GBs, in Al bicrystal. The energy of generalized grain-boundary stacking faults (GB–SF) is determined, and the preferred directions and the energy barrier are established for grain-boundary slippage. It is shown that the relative slippage of neighboring grains at certain directions of particle shears is accompanied by conservative migration of GB in the direction perpendicular to its plain. The modeling data are comparative to known grain-boundary shear-migration coupling mechanisms in Al.
- OSTI ID:
- 22771002
- Journal Information:
- Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 10 Vol. 60; ISSN 1063-7834
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dynamics of Helium-Loaded Grain Boundaries under Shear Deformation in α-Fe
Computer simulation of grain boundary self-diffusion in aluminum