Examination of the cold-worked structure formed in polycrystalline 3% silicon-iron sheet, by optical and transmission electron microscopy, showed that the deformation process was inhomogeneous. The dislocations were arranged into dense complex networks, which formed boundaries between regions of relatively low dislocation density; the size of these regions decreasing with increasing deformation. Very large deformations resulted in the formation of discrete sub-grains having large misorientations across the sub-grain boundaries. Stacking faults occurred in 3% silicon-iron on {112} planes, with a stacking fault energy of <40mJ/m2.

Dislocation Arrangements in Deformed Polycrystalline 3% Silicon-Iron. D.Griffiths, J.N.Riley: Acta Metallurgica, 1966, 14[6], 755-73