Structural features of tensile deformation in electrodeposited metals

The characteristic feature of the structure of electrolytic copper and nickel is the presence in the grains of subgranular dislocation boundaries and twinning of growth origin. The subgranular dislocation boundaries are mostly found in the form of planar networks of dislocations having almost screw orientation. Other types of boundaries were also noticed: edge boundaries, dipole configurations, volumetric dislocation nodes, and ragged boundaries. The presence of thermal and stress fields causes disintegration of unstable subgranular dislocation boundaries of growth origin. The disintegration of the boundaries is related to significant restructuring of the dislocation structure and is clearly demonstrated by various methods of physical analysis.