Stresses of hexagonal screw dislocation arrays. IV. Cell aggregates

Due to their rotational stresses as well as the necessity of fitting „rims”︁, discussed in Part III, isolated dislocation cells constructable from hexapoles have higher energies than the same cells in aggregates in which the sense of rotation alternates from one cell to the next. With respect to the rotational stresses, this is demonstrated by the example of aggregates of up to thirty‐two single hexapoles, and an aggregate of four thirteen‐unit …