Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia

М. А. Nikitina, Engineer of the Laboratory for Mechanics of Gradient Nanomaterials named after A. P. Zhilyaev, e-mail: mgurbich@yandex.ru
А. М. Pesin, Professor of the Department of Materials Processing Technologies, Doctor of Technical Sciences, e-mail: pesin@bk.ru
L. V. Nosov, Engineer of the Laboratory for Mechanics of Gradient Nanomaterials named after A. P. Zhilyaev, e-mail: nosov.leopold@yandex.ru
D. О. Pustovoitov, Associate Professor of the Department of Materials Processing Technologies, e-mail: pustovoitov_den@mail.ru

One of the trends in the development of aluminum alloys of the Al – Mg system is to increase strength without increasing density by introducing additives of rare earth metals, such as scandium, which, due to dispersion hardening, can significantly increase the conditional yield strength. The main disadvantage of scandium–containing alloys (Al — 2% Sc) is their high cost, which attempts to reduce at the moment have not led to a significant reduction in the cost of finished products. The high cost of semi–finished products is a deterrent to the use of Al – Sc alloys in various industries. One of the ways to reduce the cost of semi-finished products is to reduce costs during their production. The replacement of symmetrical rolling with asymmetric rolling in the last passes of hot and cold rolling is considered, which significantly reduces the number of passes.The  research was carried out on a thermally non–deformable aluminum alloy of the Al – Mg – Sc system of the 1545K grade. Rolled semi-finished products using standard technology and asymmetric rolling were manufactured at the DUO 400 laboratory-industrial double-roll mill of the laboratory for mechanics of gradient nanomaterials named after A. P. Zhi lyaev of Nosov Magnitogorsk State Technical University. Asymmetric rolling has significantly reduced the force per pass; compression in one pass has become higher than with standard technology. The obtained mechanical characteristics and the study of the microstructure indicate the positive effect of the asymmetric rolling method on the properties of the 1545K aluminum deformable alloy.
The research was carried out with the support of RSF grant (agreement No. 22-49-02041).

1. Filatov Yu. A. Aluminium alloys of the Al – Mg – Sc system for space technology. Tekhnologiya legkih splavov. 2013. No. 4. pp. 61–65.
2. Zaharov V. V., Filatov Yu. A. Modern trends in the development of aluminium alloys doped with scandium. Tekhnologiya legkih splavov. 2022. No. 3. pp. 9–18.
3. Filatov Yu. A. Development of ideas about scandium doping of Al – Mg alloys. Tekhnologiya legkih splavov. 2015. No. 2. pp. 19–22.
4. Filatov Yu. A., Elagin V. I., Zaharov V. V., Panasyugina L. I. et al. Cryogenic deformable thermally non-hardening aluminum-based alloy. Patent RF, MPK C22C 21/08. Patent bulletin No. 1. Applied: 06.04.2007. Published: 10.01.2009.
5. Zaharov V. V., Filatov Yu. A., Drits A. M. Possibilities for increasing the strength properties of large-sized semis made of Al – Mg – Sc alloys. Tekhnologiya legkih splavov. 2023. No. 4. pp. 34–41.
6. Nikitina M., Gradoboev A., Ryabov D., Vakhromov R. et al. Efficiency of Sc for strengthening and formability improvement of 5XXX BIW Sheets. Light Metals 2023. TMS 2023. The Minerals, Metals & Materials Series. pp. 1223–1228.
7. Willey L. A. Aluminium Co оf America. Aluminium scandium alloy. Patent US, No. 3619181 A, MPK51 C 22 C 21/00. Applied: 29.10.1968. Published: 09.11.1971. 8 p.
8. Drits M. E., Toropova L. S., Bykov Yu. G., Elagin V. I. et al. Structure and properties of Al – Sc and Al – Mg – Sc alloys. Metallurgy and physical metallurgy of non-ferrous alloys. Мoscow : Nauka, 1982. pp. 213–223.
9. Zaharov V. V., Elagin V. I., Rostova T. D., Filatov Yu. A. Metal science principles of alloying aluminium alloys with scandium. Tekhnologiya legkih splavov. 2010. No. 1. pp. 67–73.
10. Filatov Yu. A., Bajdin N. G., Dobrozhinskaya R. I. et al. New thermally nonhardenable weldable cryogenic alloy 1545K of the Al – Mg – Sc system. Tekhnologiya legkih splavov. 2014. No.1. pp. 32–36.
11. Kondrateva N. B., Zolotorevskij Yu. S. Aluminium and magnesium alloys (magnalium). Industrial aluminium alloys: reference book. Мoscow : Metallurgiya, 1984. pp. 37–51.
12. Loginov Yu. N., Nepryakhin S. O., Isyakaev K. T. Simulation of plate rolling of the aluminium alloy with options of softening processes. Vestnik of Nosov Magnitogorsk State Technical University. 2024. Vol. 22, No. 3. pp. 178–187.
13. Pesin A. M., Pustovoitov D. O., Shveeva T. V. et al. Simulation of nonmonotonic metal flow during asymmetric sheet rolling with different velocities of the rolls. Vestnik of Nosov Magnitogorsk State Technical University. 2017. Vol. 15, No. 1. pp. 56–63.
14. Kozhevnikov А., Shalaevskii D., Kozhevnikov I., Smirnov А. et al. Algorithm for designing asymmetrical rolling mode. Ferrous Metallurgy Bulletin of Scientific Technical and Economic Information. 2024. Vol. 80. pp. 72–81.
15. Pesin A. M., Pustovoitov D. O., Pesin I. A., Kozhemiakina A. E. et al. Developing asymmetric rolling process schedules for metal narrow strips, showing higher strength and ductility. Theory and technology of metallurgical production. 2022. No. 41. pp. 32–40.
16. Zhi C. C., Wu Z. Y., Ma L. F., Huang Z. Q. et al. Effect of thickness ratio on interfacial structure and mechanical properties of Mg/Al composite plates in differential temperature asymmetrical rolling. J. Mater. Res. Technol. 2023. Vol. 24. pp. 8332–8347.
17. Amegadzie M. Y., Bishop D. P. Effect of asymmetric rolling on the microstructure and mechanical properties of wrought 6061 aluminium. Mater. Today Commun. 2020. Vol. 25. 101283.
18. Qilin Zhao, Xianlei Hu, Xianghua Liu. Analysis of mechanical parameters in multi-pass asymmetrical rolling of strip by slab method. Materials. 2023. Vol. 16, Iss. 18. 6286.
19. GOST 9498–2019. Flat ingots of aluminium and wrought aluminium alloys for rolling. Specifications. Introduced: 01.12.2019.