Abstract
The energy-misorientation relationship of grain boundaries in copper was measured by recording the rotation rate of a single crystal sphere of copper sintered on to a flat single crystal of the same material. The results obtained suggest that low-energy boundaries may exist at non-high-coincidence orientation relationships and that the shape of the energy-misorientation curve in the vicinity of an energy cusp may have the shape of a trough or a V with an obtuse angle at the tip. Shapes of this type seem inconsistent with localized misfit dislocation models of the structure of grain boundaries.
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