Features of structure of copper two-dimensional polycrystals obtained by recrystallization method and nature of its changes in process of plastic deformation

Influence of conditions of recrystallization on the structure of polycrystalline samples of copper and type of boundaries is investigated. It is experimentally shown that depending on the degree of deformation preceding recrystallization annealing, all the samples may be divided conditionally into three types - ''monocrystals'' with the twins crossing all over the sample; coarse-grained samples containing boundaries of the general type and special type (including twinning); fine-grained samples - of the general type. In the grains of such samples special boundaries including twinning and boundaries of the general type are found. It is shown that during plastic deformation of samples various mechanisms of tension relaxation are realized depending on the type of structure and, finally, determine their mechanical characteristics