The 112 lateral twin boundary in FCC materials

The Sigma=3 {112} interface has been examined by several research groups using both diffraction-contrast and high-resolution transmission electron microscopy (HRTEM) imaging techniques. In general, this boundary can adopt different structures which correspond to different translation states. Whether the differences are due to intrinsic or extrinsic factors and their possible impact on the properties of such boundaries (migration and interaction with extrinsic dislocations) has been examined in the present study. Particular attention has been paid to the relationship between the rigid-body translation and the 9R stacking sequence which can form when the boundary dissociates. Further details will be given elsewhere [1-3]).