Strain field due to a slip band near a grain boundary in an Fe-6at.% Si bicrystal. II. Interpretation of double-crystal topographs

The lattice distortion due to the head of the slip band at the grain boundary is measured by double-crystal topography. The head of the slip band is approximated by a macrodislocation situated at the grain boundary. To interpret the topographs, the relaxation due to the free surface is included. The Burgers vectors of macrodislocations, i.e. the number of accumulated dislocations, are found.