Search academic texts

Information × Registration Number 0217U002810, 0117U002791 , R & D reports Title Multiscale vortex flow in aluminum and titanium alloys under severe plastic deformation by Twist Extrusion. popup.stage_title Head Beygelzimer Yakiv Yukhymovych, Доктор технічних наук Registration Date 11-12-2017 Organization Donetsk Institute of Physics @ Engineering named after O.O.Galkin NAS of Ukraine popup.description2 Object of research: Methods and Effects of severe plastic deformation, AB87 aluminum alloy, commercially pure titanium VT1-0. Objective: To establish the laws of kinematics of vortex flows in a screw extrusion, as well as the study of their influence on the mechanical properties of aluminum and titanium alloys, their structure and mass transfer in the bulk of the sample. Methods: The finite element method, optical and electron microscopy, electron diffraction zvorotnorozsiyanih, mechanical tests. Results: It is shown that when the screw extrusion, the material sold micro- and macroscopic eddy currents. Microscopic eddy currents due to the physical mechanisms of plastic deformation in a second step a simple offset. Macroscopic vortices are adequately described in the framework of the classical theory of plasticity. The finite element method is designed rotor velocity vector of these flows. It is shown that the microscopic eddies lead to fragmentation and homogenization of the microstructure of materials, macroscopic - to the controlled mass transfer in the bulk of the sample. The algorithm and software for computer modeling of multiscale effect of vortices on the microstructure of materials. Projected use of the results. Described in the effects of eddy currents when the screw extrusion may be used for: obtaining monolithic hybrid materials with a specific vortex structure, combines high permeability, high strength and low specific weight of which can be made lighter and stronger magnetic cores or cores of high-power transformers; obtaining a laminated composite with high fatigue strength; increasing the plasticity of secondary aluminum alloys and expansion of their application. Product Description popup.authors Давиденко Олександр Анатолійович Дмитренко Вікторія Юріївна Распорня Дмитро Володимирович popup.nrat_date 2020-04-02 Close