Moscow Polytechnic University, Moscow, Russia

А. N. Koshmin, Associate Professor of the Scientific Activity Sector, Candidate of Technical Sciences, e-mail: koshmin.an@misis.ru

National University of Science and Technology MISIS, Moscow, Russia
А. V. Zinoviev, Leading Expert of the Scientific Project of the Department of Metal Pressure Treatment, Doctor of Technical Sciences, Professor
А. N. Khakimova, Master’s Student of the Department of Metal Pressure Treatment

The results of finite element modeling and analysis of the process of doublesided cladding by hot rolling of an aluminum alloy of the Al – Cu – Mn system doped with zinc and magnesium are presented. To verify the calculated results, experimental work has been performed on cladding in the temperature range of 300–450 oC and a relative deformation of 20–60%. As a result of the modeling, it has been found that with an increase in compression during cladding, the nature of shear deformations in the rolled layers changes significantly. At compressions of 20–30%, the magnitude of shear deformations in the cladding and main layers is 0.40 and 0.05, respectively. With an increase in the degree of compression to 40–50%, the direction of shear deformations in the cladding layer changes to the opposite, their magnitude is –0.4 in the cladding layer and 0.2 in the main one. The maximum value of the ratio of normal stresses to the flow stress of the base layer has been found in all cases in the neutral plane of the deformation zone, located within 0.7–0.8 of its length. The peak value of this ratio is reached at compressions of 50% and 60% and at a rolling temperature of 450 oC in both cases is 2.7 (211 to 77 and 237 to 87 MPa, respectively). As a result of the experiment, during hot cladding with a combination of temperatures and compressions in the ranges of 300–375 ^oC and 20–30%, respectively, the connection of the layers has not been achieved. Based on the results of the analysis, a calculation criterion is proposed for predicting the possibility of connecting the layers of the studied aluminum alloys during hot cladding and evaluating the resulting peeling strength of the layers.
The research was carried out at expense of the grant of the Russian Science Foundation No. 23–79–01172, https://rscf.ru/project/23–79–01172/.

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