Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg, Russia

N. I. Bushueva, Research Engineer of the Scientific Laboratory of the Dept. of Metal Forming, e-mail: n.i.bushueva@urfu.ru

G. V. Shimov, Associate Professor of the Dept. of Metal Forming, Candidate of Technical Sciences, e-mail: g.v.shimov@urfu.ru

Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg, Russia¹ ; M. N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia²
Yu. N. Loginov, Professor of the Department of the Dept. of Metal Forming¹, Doctor of Technical Sciences, Leading Researcher², e-mail: j.n.loginov@urfu.ru

The possibility of producing a bimetallic rod from an aluminum alloy by pressing has been studied. At the first stage of the study, numerical modeling was carried out in a specialized software package using the finite element method. The problem of pressing a large-size rod made of aluminum alloy 6061 was formulated using an additional bar made of a softer aluminum alloy in the processing state for direct and reverse pressing options. The features of the stress-strain state of materials during the pressing process have been studied. Using the function of tracer points, a comparison of flow rates of materials of the main and additional bars during plastic deformation was made. Graphs of the dependence of cladding layer thickness on the length of the rod`s pressed part for the options of direct and reverse pressing were constructed. Graphs of the flow rate distribution of materials of the main and additional bars for direct and reverse pressing options were also constructed. It has been established that to achieve the task of producing a bimetallic rod, it is prefera bleto use the direct pressing method. Based on the results of numerical modeling, a defective area was identified where peeling of the cladding bar metal is observed. An experimental modeling of the bimetallic rod pressing process was carried out in order to confirm the correctness of the numerical modeling results. During experimental pressing, a defect was detected on the surface of the bimetallic product, which corresponds to the numerical simulation data. Conclusions are drawn about the possible causes of the defect.
The research was carried out with financial support from the Ministry of Science and Higher Education of the Russian Federation within the framework of the Development Program of the Ural Federal University named after the first President of Russia B. N. Yeltsin in accordance with the strategic academic leadership program “Priority – 2030”.

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