![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
Some electron microscope observations are presented showing the dissociation of [100] tilt boundaries in thin-film welded bicrystals of gold. Boundaries near Σ9, Σ11, and Σ99 misorientations dissociate to give twins and lower energy boundaries. The boundaries produced are not always of higher coincidence (lower Σ) than the original boundary. In particular the Σ33 boundary at 20° about [110] is found to have lower energy than the Σ11 boundary. This was not expected from previous measurements and calculations of the energy of [110] tilt boundaries. Possible mechanisms for the dissociation are discussed and the extent to which the conclusions can be applied to bulk polycrystals is considered.