β Scribed by B. Ralph; P. R. Howell; T. F. Page
No coin nor oath required. For personal study only.
A model of grain boundary structure is presented which is based on the concept of planar matching across the interface. This approach yields those displacements necessary to define the defect, population, and where possible, localisation of these displacements is seen to generate a variety of defects, some of which are analogous to the Van der Merwe dislocations in a partially coherent twoβphase interface. Thus it will be shown that the majority of grain boundaries contain dislocations with inβplane Burgers vectors, which can be quantified both in terms of magnitude and direction, although it will be shown that the displacement patterns for the general case will be highly complex. Similarly, those dislocations which have hitherto been associated with low angle grain boundaries and coincidenceβsite lattice grain boundaries can be generated by considering the matching of plane stacks.
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