On the Structure of Tilt Grain Boundaries in Cubic Metals I. Symmetrical Tilt Boundaries

摘要: The results of the study symmetrical tilt boundaries, reported in preceding part I, are generalized to asymmetrical boundaries. A classification boundaries cubic crystals is developed that reveals which choose order equilibrium faceting or intrinsic grain boundary dislocations (g.b.ds) accommodating a misorientation. Two series atomistic studies structures presented based on this classification. first long-period (27 ^ 97) [110] aluminium. aims investigate whether these composed fundamental structural elements, same way as was found I for and see if localized, distinct stress fields edge g.b.ds exist throughout misorientation range. With use study, principle continuity structure enunciated unit representation 27 — 1193 derived an example. It generally Burgers vectors secondary favoured reference structures, non-primitive d.s.c. vectors. reason given simple formula derive such any structure. pointed out that, general, very low angle {0