Combined pressure treatment processes are one of the most promising methods of deformation. They include two or more discrete deformation processes. This combination gives advantages over individual methods. For example, it is possible to ensure the continuity of the process, the expansion of the assortment is realized due to the deformation of long blanks. Therefore, the development of new combined deformation technologies that allow obtaining high-quality workpieces and their theoretical justification is an urgent task. The main idea of the project is to develop the theoretical foundations of new combined technologies for deforming non-ferrous metals and alloys, allowing for intensive plastic deformations in the material, which will contribute to the development and introduction into production of new innovative technologies for producing long-length metal products with an increased level of mechanical properties.

Development of theoretical foundations for the creation and implementation of new innovative processes of deformation of non-ferrous metals and alloys, combining two or more discrete processes

Based on the analysis of scientific, technical and patent literature, 3 new combined processes of implementation in the process of deformation of intense plastic deformation will be developed, allowing to obtain long-length products made of non-ferrous metals and alloys with an ultra-fine-grained structure; analytical dependences of deformation forces on the geometric and technological parameters of the ECAP-Linex process will be determined, allowing to determine rational parameters of implementation this process; computer models of the new ECAP-Linex combined process will be built and the influence of technological and geometric parameters of the process on the stress-strain state, energy-force parameters and the evolution of the microstructure of the workpiece material will be established. Analytical dependences of deformation forces, back pressure, and speed characteristics on the geometric and technological parameters of the rolling-ECAP process with combined rolls (1 pair of horizontal rolls, the 2nd pair of vertical rolls) will be determined; computer models of the rolling-ECAP process with combined rolls will be built and optimal parameters ensuring the best stress-deformed state and power parameters; Using the Kolmogorov (JMAK) and cellular Automata methods, the influence of technological and geometric parameters of the rolling-ECAP process with combined rolls on changing the shape and grain size of the initial structure of the deformable material will be established. Modeling of the melt crystallization process into a solid billet for subsequent deformation will be carried out; optimal parameters of the casting-rolling-ECAP process will be determined, providing the best stress-strain state and energy-force parameters; dependences of technological and geometric parameters of the combined casting-rolling-ECAP process on changes in the shape and size of grains of the initial structure will be obtained deformable material; recommendations will be developed for the introduction of the developed technologies into production. Based on the results of scientific research, 2 (two) articles will be published in peer-reviewed scientific publications in the scientific field of the project, indexed in the Science Citation Index Expanded of the Web of Science database or having a CiteScore percentile in the Scopus database of at least 35 (thirty-five). In addition, one (1) article will be published in a peer-reviewed foreign or domestic publication recommended by SHEQAC. The results of the research will be reported at international European conferences in Bulgaria, the Czech Republic, Poland or other international conferences abroad, as well as at international conferences in Russia, Belarus and Kazakhstan.

Development of the theoretical foundations for the creation and implementation of new innovative processes of deformation of non-ferrous metals and alloys, combining two or more discrete processes. development of the theoretical foundations for the creation and implementation of new innovative processes of deformation of non-ferrous metals and alloys, combining two or more discrete processes. Computer models of the new RCUP-Lainex combined process have been constructed and the influence of technological and geometric process parameters on the stress-strain state, energy-strength parameters and the evolution of the microstructure of the workpiece material has been established. The analytical dependences of the deformation forces, back pressure, and velocity characteristics on the geometric and technological parameters of the rolling-RCUP process with combined rolls (1 pair of horizontal rolls, the 2nd pair of vertical rolls) are determined. Computer models of the rolling-RCUP process with combined rolls have been constructed and optimal parameters have been determined to ensure the best stress-strain state and energy-strength parameters. Using the methods of Kolmogorov (JMAK) and cellular Automata, the influence of technological and geometric parameters of the rolling-RCUP process with combined rolls on the change in the shape and grain size of the initial structure of the deformable material has been established. The process of crystallization of the melt into a solid billet for subsequent deformation is modeled. The rational technological parameters of the process have been determined, which make it possible to obtain a billet with a minimum fraction of liquid melt in the core, which is immediately suitable for deformation at the outlet. The optimal parameters of the casting-rolling-RCUP process have been determined, providing the best stress-strain state and energy-strength parameters by finite element modeling of the rolling-RCUP process for the billet obtained at the previous stage of research.