The plasticity effect of amorphous substances in the model of delocalized atoms

Inorganic glasses, amorphous organic polymers and massive amorphous metal alloys (metallic glasses) exhibit a permanent deformation that persists for an arbitrarily long time at 200C. However, when heated below the glass transition temperature and near it, this deformation relaxes almost to disappearance. However, as a rule, the term "plastic deformation" is used for it. The nature of the plasticity effect of glasses remains not entirely clear, and is an unsolved problem. In general, the review is devoted to the discussion of the main regularities and the nature of plastic deformation of glassy solids and its thermally stimulated relaxation. Various interpretation options are considered. The mechanism and nature of this phenomenon are discussed in detail within the framework of the modelof delocalized atoms developed at the Dorzhi Banzarov Buryat State University and at the Institute of Physical Materials Science of the SB RAS.