Influence of Substructural and Solid-Solution Strengthenings on the Formation of a Defect Structure in Cu–Al and Cu–Mn Alloys

The paper presents the results of studying the types of dislocation structures in polycrystalline Cu–Al and Cu–Mn alloys with different additives of the second element. The quantitative parameters of these structures were investigated at different degrees of deformation. The transmission electron microscopy (TEM) data are reported. Alloys of homogeneous solid solutions with different solid-solution strengthening were investigated. The role of the average scalar dislocation density is determined. The following parameters of the dislocation substructure were measured: the values of dislocation density in walls and in cells, the sizes of cells, and the width of their walls. The relationship between the dislocation structure parameters and the value of solid-solution strengthening during the accumulation of dislocations in the material after plastic deformation is established.