Effects of coherency strain on structure and migration of a coherent grain boundary in Cu
In situ high-resolution transmission electron microscopy of atomic structures of a coherent
grain boundary is reported in a Cu bicrystal specimen composed of two grains with surface
normal directions of [1 0 0] and [1 1 0]. Although the surface energy anisotropy favors the
growth of the [1 0 0]-oriented grain, grain-boundary migration does not occur. Instead, inside
the [1 0 0]-oriented grain standing off the grain boundary is a kind of coherent interface
observed. We relate these observations to the development of a coherent strain due to a …
grain boundary is reported in a Cu bicrystal specimen composed of two grains with surface
normal directions of [1 0 0] and [1 1 0]. Although the surface energy anisotropy favors the
growth of the [1 0 0]-oriented grain, grain-boundary migration does not occur. Instead, inside
the [1 0 0]-oriented grain standing off the grain boundary is a kind of coherent interface
observed. We relate these observations to the development of a coherent strain due to a …
Abstract
In situ high-resolution transmission electron microscopy of atomic structures of a coherent grain boundary is reported in a Cu bicrystal specimen composed of two grains with surface normal directions of [1 0 0] and [1 1 0]. Although the surface energy anisotropy favors the growth of the [1 0 0]-oriented grain, grain-boundary migration does not occur. Instead, inside the [1 0 0]-oriented grain standing off the grain boundary is a kind of coherent interface observed. We relate these observations to the development of a coherent strain due to a lattice misfit at the grain boundary.
Elsevier
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