Moscow Polytechnic University, Department of Material Forming and Additive Manufacturing, Moscow, Russia:
R. L. Shatalov, Professor, Doctor of Technical Sciences, e-mail: mmomd@mail.ru
V. Kh. Fam, Postgraduate Student, e-mail: hoangsqktqs@gmail.com
V. K. Chan, Postgraduate Student, e-mail: tranquang1584@gmail.com

The chemical composition of the material was studied by the opticalemission spectral method, which allowed us to determine the specific composition of aluminum alloy, which corresponds to the AD33 brand according to the Russian standard 4794-19. There was some experimental rolling of strips with a size of 3×25×190 mm with a compression of 10, 20 and 30% followed by testing the samples for rupture in order to determine the mechanical properties of the deformed rolled products. Based on the obtained data, the yield curve and the dependence of the time resistance σв and the relative elongation δ have been created to show the degree of deformation of the alloy. As the result, the regularities of changes in the strength and plastic characteristics of the degree of cold deformation of the AD33 aluminum alloy strips of known chemical composition have been established. The experiment shows that the time resistance σв and the yield strength increase with increasing compression with different intensities: σ_в increases monotonically almost linearly; increases intensively from 70 to 160 MPa at compression from 0 to 15%, and then slowly increases to 173.5 MPa at ε = 30%. The plasticity index — δ decreases from 29.35 to 11.2% according to the parabolic law of the second degree. Regression equations are obtained that allow us to calculate the main indicators of mechanical properties when rolling strips of aluminum alloy AD33 of known chemical composition. The adequacy of the obtained equations, confirmed by high correlation coefficients (R2 > 0,9), allows us to recommend them for the calculation of powwer indicators of rolling and design in automated design systems (CAD) of rational modes of deformation of aluminum alloy strips AD33.

1. Koronovskiy N. V., Yakusheva A. F. Fundamentals of geology: Textbook for universities. Moscow : Vysshaya shkola, 1991. 416 p.
2. Belyaev A. I., Bochvar O. S. et al. Metallurgy of aluminium and its alloys: Reference book. Moscow : Metallurgiya, 1983. 280 p.
3. Tretiakov A. V., Zyuzin V. I. Mechanical properties of metals and alloys under forming conditions: Reference book, 2^nd edition. Moscow : Metallurgiya, 1973. 224 p.
4. Borovushkin I. V., Kiselev L. M. Determining the mechanical properties of metals and alloys: Learner’s guide, 2nd revised edition. Syktyvkar : Syktyvkarskiy Lesnoy Institut, 2012. 107 p.
5. Bernshteyn M. L., Zaymovskiy M. A. Mechanical properties of metals. Moscow : Metallurgiya, 1979. 496 p.
6. Konyukhov A. D., Zhuravleva L. V., Shurtakov A. K. The mechanical properties of aluminium alloys and aluminium alloy welds used in gondola car bodies. Tsvetnye Metally. 2006. No. 6. pp. 68–73.
7. Koryagin Yu. D., Krainov V. I. The structure and properties of aluminium alloy 1421 subjected to plastic deformation and heat treatment. Bulletin of the South Ural State University. Series: Metallurgy. 2017. Vol. 17, No. 3. pp. 64–72.
8. Shatalov R. L., Lukash A. S., Ziselman V. L. Definition of mechanical properties of copper and brass strips on indices of hardness factors in the time of cold rolling. Tsvetnye Metally. 2014. No. 5. pp. 61–65.
9. Mark ovets M. P. The mechanical properties of metals determined by hardness. Moscow : Mashinostroenie, 1979. 192 p.
10. Brov man M. Ya. On the resistance to plastic deformation during rolling and continuous casting of metals. Metally. 2004. No. 3. pp. 24–33.
11. Malopheyev S., Kulitskiy V., Kaibyshev R. Deformation structures and strengthening mechanisms in an Al – Mg – Sc – Zr alloy. Journal of Аlloys and Compounds. 2017. Vol. 698. pp. 957–966.
12. Lee S. H., Saito Y., Sakai T., Utsunomiya H. Microstructures and mechanical properties of 6061 aluminum alloy processed by accumulative roll-bonding. Materials Science and Engineering: A. 2002. Vol. 325, Iss. 1–2. pp. 228–235.
13. Baranov V. N., Sidelnikov S. B., Bezrukikh A. I., Zenkin E. Y. Research of rolling regimes and mechanical prop erties of cold-rolled, annealed and welded semi-finished products from experimental alloys of Al – Mg system, economical alloyed by scandium. Tsvetnye Metally. 2017. No. 9. pp. 83–88.
14. Kwon Y. J., Shigematsu I., Saito N. Mechanical properties of finegrained aluminum alloy produced by friction stir process. Scripta Materialia. 2003. Vol. 49, Iss. 8. pp. 785–789.
15. Kanghua Chen, Hongwei Liu, Zhuo Zhang, Song Li, Richard I. T. The improvement of constituent dissolution and mechanical properties of 7055 aluminum alloy by stepped heat treatments. Journal of Materials Processing Technology. 2003. Vol. 142, Iss. 1. pp. 190–196.
16. Dehsorkhi R. N., Qods F., Tajally M. Investigation on microstructure and mechanical properties of Al – Zn composite during accumulative roll bonding (ARB) process. Materials Science and Engineering: A. 2011. Vol. 530. pp. 63–72.
17. GOST 1497–84. Metal s. Methods of tension test. Introduced: 01.01.1986. Moscow : Izdatelstvo standartov, 1984.
18. Polukhin V. P., Khlo ponin V. N., Sigitov E. V., Kosyreva M. V., Timoshchuk K. P. Calculation algorithms for the main rolling mill parameters. Moscow : Metallurgiya, 1975. 231 p.
19. Kucheryaev B. V., Zinoviev A. V., Krakht V. B. An experimental verification of the formula for calculating the energy and forces involved in sheet rolling operation. Proizvodstvo prokata. 2002. No. 4. pp. 2–7.
20. Shatalov R. L. Design of sheet rolling parameters: Learner’s guide. Moscow : Moskovskiy politekhnicheskiy universitet, 2018. 185 p.
21. GOST 4784–2019. Aluminium and wrought aluminium alloys. Grades. Introduced: 01.09.2019. Moscow : Izdatelstvo standartov, 2019.