A taxonomy of grain boundary migration mechanisms via displacement texture characterization

Texture Development Dependence on Grain Boundary Properties

The motivation for this work is to explain the development of special textures during recrystallization such as the cube component, {001}<100> in fcc metals. Monte Carlo simulation is used with two different mobility and energy functions. The energy function has little influence on texture development whereas the mobility function has a strong influence. A mobility function with a single broad ...

Vacancy Generation During Grain Boundary Migration

We present a molecular dynamics simulation study of vacancy generation and emission from grain boundaries during curvature-driven grain boundary migration. The U-shaped half-loop bicrystal geometry is employed in order to maintain a constant driving force during boundary migration. Nonlinearities in plots of half-loop grain area versus time indicate the onset of non-steady-state behavior and va...

Sensitivity of Texture Development during Grain Growth to Anisotropy of Grain Boundary Properties

Atom-by-atom observation of grain boundary migration in graphene.

Grain boundary (GB) migration in polycrystalline solids is a materials science manifestation of survival of the fittest, with adjacent grains competing to add atoms to their outer surfaces at each other's expense. This process is thermodynamically favored when it lowers the total GB area in the sample, thereby reducing the excess free energy contributed by the boundaries. In this picture, a cur...

Experimental observations of stress-driven grain boundary migration.

In crystalline materials, plastic deformation occurs by the motion of dislocations, and the regions between individual crystallites, called grain boundaries, act as obstacles to dislocation motion. Grain boundaries are widely envisaged to be mechanically static structures, but this report outlines an experimental investigation of stress-driven grain boundary migration manifested as grain growth...