Vacancies as a Metal Alloying Element

Abstract

The study and development of methods for a new type of environmentally friendly alloying of metals with a controlled nonequilibrium concentration of vacancies. Methodology. System analysis of methods of alloying metals with a nonequilibrium concentration of vacancies and the mechanisms of the influence of this alloying on the structure and properties of metals. Results. The theoretical foundations of doping with a nonequilibrium concentration of vacancies by means of vacancy hardening, hydrostatic compression, cyclic deformation, special deformation-heat treatment according to the type of high-speed recrystallization annealing of cold-deformed metal, as well as a combination of these methods are developed. Originality. The processes that result in the interaction of vacancies with moving dislocations, which significantly changes the trajectories of the dislocations and forms a dislocation substructure with special quasi-equilibrium boundaries that are close in properties to the boundaries formed during high-temperature thermomechanical processing. Practical value. The principles of regulating the parameters of vacancy doping, ensuring its effectiveness and the controlled parameters of doping methods, are indicated.