Molecular Dynamic Dimulation of Energy and Structural Stability on Twist Grain Boundary in Bicrystal Copper

Grain-boundary layering transitions in a model bicrystal

Article history: Received 15 June 2013 Accepted 4 September 2013 Available online 11 September 2013

On the Optics of Twist Grain Boundary Smectics

We have studied theoretically the optical properties of twist grain boundary

Giant-block twist grain boundary smectic phases.

Study of a diverse set of chiral smectic materials, each of which has twist grain boundary (TGB) phases over a broad temperature range and exhibits grid patterns in the Grandjean textures of the TGB helix, shows that these features arise from a common structure: "giant" smectic blocks of planar layers of thickness l(b) > 200 nm terminated by GBs that are sharp, mediating large angular jumps in ...

Influence of grain boundary characteristics on thermal stability in nanotwinned copper

High density grain boundaries provide high strength, but may introduce undesirable features, such as high Fermi levels and instability. We investigated the kinetics of recovery and recrystallization of Cu that was manufactured to include both nanotwins (NT) and high-angle columnar boundaries. We used the isothermal Johnson-Mehl-Avrami-Kolmogorov (JMAK) model to estimate activation energy values...

Grain boundary orientation effects on deformation of Ta bicrystal nanopillars under high strain-rate compression