Abstract
This work presents the results of experimental investigations into deformation relief formed at the faces of aluminium single crystals. The aim of the investigations was to define the rules of macro fragmentation and macro localisation processes in plastic deformation. It was established that for the families of maximum loaded planes {111} in the aluminium single crystals, one can differentiate volumes which aren't limited to the specimen's front face. It is assumed that shearing in these volumes is eased during plastic deformation due to the absence of a reverse stress. Moreover, it is suggested that such volumes are called volumes of eased slip (VES). In addition to this, the role played by the volume of eased slip at the macroscopic level during the plastic deformation process was examined.