Extended dislocation barriers at tilt boundaries in face-centered cubic crystals were considered. For boundaries with a high degree of lattice coincidence, stable extended dislocation barriers which were analogous to those occurring within a single crystal, were shown to exist. Other boundaries could have components which were equivalent to high-coincidence boundaries. The boundary barriers were shown to be possible nucleation sources for mechanical twins or martensite phase transformations.

Extended Dislocation Barriers in Tilt Boundaries in Face-Centered Cubic Crystals. J.P.Hirth, R.G.Hoagland: Materials Research Innovations, 1998, 1[4], 235-7