Journals →  Tsvetnye Metally →  2016 →  #11 →  Back

ArticleName Structure and properties of deformed intermediate products of high-strength aluminium alloy (Al – Zn – Mg – Ni – Fe system)
DOI 10.17580/tsm.2016.11.10
ArticleAuthor Belov N. A., Shurkin P. K., Akopyan T. K.

National University of Science and Technology “MISiS”, Moscow, Russia.

N. A. Belov, Professor of a Chair of Casting Technologies and Art Material Treatment, e-mail:
P. K. Shurkin, Post-Graduate Student of a Chair of Metall Forming, e-mail:


National University of Science and Technology “MISiS”1, Moscow, Russia. ; A. A. Baikov Institute of Metallurgy and Materials Science2, Moscow, Russia:
T. K. Akopyan, Researcher of a Chair1,2, e-mail:


There was carried out the experimental investigation of deformation capacity of high-strength econimically alloyed aluminium alloy (Al – Zn – Mg – Ni – Fe system). Calculation methods defined the critical temperatures and forecasted the structural changes in the process of thermaldeformation treatment. A cross-section flat ingot was obtained in a nearly working like environment. This ingot had passed through the whole operation cycle with obtaining of hot-rolled sheet (5.5 mm thickness) and sheet iron (0.5 mm thickness) with the reduction degrees of 86% and 90% respectively. Microstructural investigations show that iron and nickel are joint into the eutectic-formed Al9FeNi phase on all stages, and non-equilibrium phases after air cooling are isolated as fine-disperse particles, having no influence on technological plasticity. The structure of sheet iron is a “natural composite” type, where the compact evenly distributed eutectic aluminides (1–2 μm) are the reinforcing function. Reinforcing thermal treatment according to the modes T and T1 obtained the competitive indicators of mechanical properties: in particular, the tensile strength was 481 and 580 MPa, respectively. This system alloy can also be successfully obtained in the form of pressed bars (confirmed by the investigations of the samples, given by the industrial partner RUSAL). The pressed bars have high plasticity (over 14%) in T1 mode. Both as a result of rolling and pressing, the difference between the tensile strength and yield stress in T and T1 modes is over 200 MPa, which tells about the possibility of regulation of the properties by the selection of thermal treatment modes.

keywords High strength aluminum alloys, deformation, rolling, structure, heat treatment, mechanical properties

1. Belov N. A. Fazovyy sostav promyshlennykh i perspektivnykh alyuminievykh splavov (Phase composition of industrial and prospective aluminium alloys). Moscow : MISiS, 2010. 511 p.
2. Beletskiy V. M., Krivov G. A. Alyuminievye splavy (sostav, svoystva, tekhnologiya, primenenie) : spravochnik (Aluminium alloys (composition, properties, technology, application) : reference book). Under the editorship of I. N. Fridlyander. Kiev : KOMINTEKh, 2005. 365 p.
3. Alieva S. G., Altman M. B., Ambartsumyan S. M. et al. Promyshlennye alyuminievye splavy (Industrial aluminium alloys). Reference book. Moscow : Metallurgiya, 1984. 528 p.
4. Xing Huang, Qinglin Pan, Bo Li, Zhiming Liu, Zhiqi Huang, Zhimin Yin. Microstructure, mechanical properties and stress corrosion cracking of Al – Zn – Mg – Zr alloy sheet with trace amount of Sc. Journal of Alloys and Compounds. 2015. No. 650. pp. 805–820.
5. Yunjia Sh, Qinglin Pan, Mengjia Li, Xing Huang, Bo Li. Effect of Sc and Zr additions on corrosion behavior of Al – Zn – Mg – Cu alloys. Journal of Alloys and Compounds. 2014. No. 612. pp. 42–50.
6. Rometsch P. A., Zhang Y., Knigh S. Heat treatment of 7xxx series aluminium alloys — some recent developments. Transactions of Nonferrous Metals Society of China. 2014. No. 24. pp. 2003−2017.
7. Li Chun Mei, Chen Zhi Qian, Zeng Su Min, Cheng Nan Pu, Chen Tian Xiao. Intermetallic phase formation and evolution during homogenization and solution in Al – Zn – Mg – Cu alloys. Science China. 2014. No. 56. pp. 2827–
8. Ibrahim M. F., Samuel A. M., Samuel F. H. A preliminary study on optimizing the heat treatment of high strength Al – Cu – Mg – Zn alloys. Materials and Design. 2014. No. 57. pp. 342–350.
9. Tao Xiao, Yunlai Deng, Lingying Ye, Huaqiang Lin, Chaojun Shan, Pengwei Qian. Effect of three-stage homogenization on mechanical properties and stress corrosion cracking of Al – Zn – Mg – Zr alloys. Materials Science & Engineering A. 2015. No. 675. pp. 280–288.
10. Kai Wen, Yunqiang Fan, Guojun Wang, Longbin Jin, Xiwu Li, Zhihui Li, Yongan Zhang, Baiqing Xiong. Aging behavior and precipitate characterization of a high Zn-containing Al – Zn – Mg – Cu alloy with various tempers. Materials and Design. 2016. No. 101. pp. 16–23.
11. Ketabchi М., Mohammadi H., Izadi M. Finite-element simulation and experimental investigation of isothermal backward extrusion of 7075 Al alloy. Arabian Journal for Science and Engineering. 2012. No. 37. pp. 2287– 2296.
12. Deng Ying, Yin Zhi-min, Cong Fu-guan. Thermo-plasticity of highstrength and high-ductility 7050 aluminum ingot. Journal of Central South University. 2012. No. 19. pp. 1169−1174.
13. Vakhromov P. O., Tkachenko E. A., Antipov V. V. Zakonomernosti formirovaniya struktury i svoystv kovochnykh splavov sistemy Al – Zn – Mg – Cu c razlichnym soderzhaniem osnovnykh legiruyushchikh komponentov, mikrodobavok i primesey (Natural development of forming structure and properties of forgeable Al – Zn – Mg – Cu alloys having different content of main alloying elements, microadditives and impurities). Vestnik SGAU = Vestnik of the Samara State Aerospace University. 2012. No. 5 (35). pp. 225– 232.
14. Belov N. A., Shcherbakov M. V., Belov V. D. O tekhnologichnosti vysokoprochnogo ekonomnolegirovannogo nikelina ATs6N0,5Zh pri lite, prokatke i svarke (About the workability of high-strength economically alloyed nickeline ATs6N0,5Zh during the casting, rolling and welding). Tsvetnye Metally = Non-ferrous metals. 2011. No. 12. pp. 94–98.
15. Belov N. A., Belov V. D., Alabin A. N., Mishurov S. S. New generation of economically alloyed aluminum alloys. Metallurgist. 2010. Vol. 54, No. 5. pp. 311–316.
16. Belov N. A., Belov V. D., Alabin A. N., Zlobin G. S., Mishurin S. S. Vysokoprochnyy ekonomnolegirovannyy splav na osnove alyuminiya (Highstrength economically alloyed aluminium-based alloy). Patent RF, No. 2484168. Applied: 21.02.2012. Published: 10.06.2013. Bulletin No. 16.
17. GOST 1497–84. Metally. Metody ispytaniy na rastyazhenie (State Standard 1497–84. Metals. Methods of tension test). Introduced: 1986-01-01. (in Russian)
18. Naumova E. A., Belov N. A., Nikitin B. K., Gromov A. V. Issledovanie tekhnologicheskikh i mekhanicheskikh svoystv novykh liteynykh evtekticheskikh alyuminievykh splavov tipa “estestvennye kompozity” (Investigation of technological and mechanical properties of new casting eutectic aluminum alloys of type “natural composites”). Novosti materialovedeniya. Nauka i tekhnika = News of Material Science and Technology. 2016. No. 3 (21). pp. 13–20.

Language of full-text russian
Full content Buy