ISSN (print) 1995-2732
ISSN (online) 2412-9003

 

download PDF

Abstract

The paper presents the study on mechanical and corrosion properties of rolled sheet products from a new alloy of the Al-Mg-Sc system in a deformed and heat treated state. Its use and development of technologies for the production of relevant parts for automobile and shipbuilding industries are important today due to the tasks of downstream aluminum processing, which are solved by RUSAL, and confirmed by the state support of a comprehensive project aimed at creating a high-technology production division, being currently carried out by the Bratsk Aluminium Smelter and Siberian Federal University. To determine mechanical and corrosion properties, the authors used sheets and coils rolled on industrial reversing hot rolling mill Quarto 2800. The tensile test was used to study deformed samples after rolling and samples produced in five heat treatment modes with varying heating temperatures of 300, 350 and 380°C and a soaking time of 1 and 3 hours. The studies on samples of rolled products with various thicknesses showed that as compared to the initial state, steel strength properties after heat treatment decrease by 12–20% on average, and ductility properties (δ) increase by 50–65%. In this case, heat treatment modes 1–3 give a fairly good ratio of strength and ductility properties. The level of these properties is comparable to the properties of alloy 01570. It is noted that a trend in a decrease in strength properties and a growth of ductile properties with increasing heat treatment temperature is also observed for samples of rolled products produced by various methods of cold rolling (cut-to-length sheets and in coils). If sheet thickness is similar, strength properties are higher, when sheets are cut-to-length rather than in coils. The corrosion tests of sheets with different thicknesses showed that the heat treatment modes under study do not have a significant influence on alloy resistance to intergranular corrosion.

Keywords

Aluminum alloys, magnalium, scandium, hot rolling, heat treatment, mechanical properties.

Baranov V.N., Sidelnikov S.B., Konstantinov I.L., Lopatina E.S., Yakivyuk O.V., Voroshilov D.S., Belokonova I.N., Frolov V.A. Siberian Federal University (SibFU), Krasnoyarsk, Russia

Zenkin E.Yu. PJSC RUSAL Bratsk, Bratsk, Russia

1. Gorbunov Yu.A. The role and prospects of rare earth metals in the development of physical and mechanical characteristics and applications of deformable aluminum alloys. Zhurnal Sibirskogo federalnogo universiteta. Seriya: Tekhnika i tekhnologii [Journal of Siberian Federal University. Engineering & Technologies], 2015, vol. 8, no.5, pp. 636–645. (In Russ.)

2. Gorbunov Yu.A. Application of products from aluminum alloys in manufacturing and repairing land and water transport in the Russian Federation. Tekhnologiya legkikh splavov [Technology of light alloys], 2015, no. 1, pp. 87–92. (In Russ.)

3. Bronz A.V., Efremov V.I., Plotnikov A.D., Chernyavskiy A.G. Alloy 1570С – material for pressurized structures of advanced reusable vehicles of RSC Energia. Kosmicheskaya tekhnika i tekhnologii [Space engineering and technology], 2014, no. 4, pp. 62–67. (In Russ.)

4. Filatov Yu.A., Plotnikov A.D. Structure and properties of deformed semi-finished products from aluminum alloy 01570C of the Al-Mg-Sc system for the RSC Energia product. Tekhnologiya legkikh splavov [Technology of light alloys], 2011, no. 2, pp. 15–26. (In Russ.)

5. Belov N.A. A phase composition of industrial and advanced aluminum alloys. Moscow: MISiS, 2010, 511 p. (In Russ.)

6. Zhemchuzhnikova D. A., Mogucheva А., Kaibyshev R. Mechanical properties and fracture behavior of an Al-Mg-Sc-Zr alloy at ambient and subzero temperatures. Materials Science & Engineering A, 2013, vol. 565, pp. 132–141.

7. Zhemchuzhnikova D., Kaibyshev R. Effect of rolling on mechanical properties and fatigue behavior of an Al-Mg-Sc-Zr alloy. Materials Science Forum, 2014, vols. 794-796, pp. 331–336.

8. Zhemchuzhnikova D. Kaibyshev R. Effect of grain size on cryogenic mechanical properties of an Al-Mg-Sc alloy. Advanced Materials Research, 2014, vol. 922, pp. 862–867.

9. Malopheyev S., Kulitskiy V., Kaibyshev R. Deformation structures and strengthening mechanisms in an Al-Mg-Sc-Zr alloy. Journal of Alloys and Compounds, 2017, vol. 698, pp. 957–966.

10. W. Kang, H.Y. Li, S.X. Zhao, Y. Han, C.L. Yang, G. Ma. Effects of homogenization treatments on the microstructure evolution, microhardness and electrical conductivity of dilute Al-Sc-Zr-Er alloys. Journal of Alloys and Compounds, 2017, vol. 704, pp. 683–692.

11. Anthony De Luca, David C. Dunand, David N. Seidman. Mechanical properties and optimization of the aging of a dilute Al-Sc-Er-Zr-Si alloy with a high Zr/Sc ratio. Acta Materialia, 2016, vol. 119, pp. 35–42.

12. Pedro Henrique R. Pereira, Ying Chun Wang, Yi Huang, Terence G. Langdon. Influence of grain size on the flow properties of an Al-Mg-Sc alloy over seven orders of magnitude of strain rate. Materials Science & Engineering, 2017, vol. 685, pp. 367–376.

13. S. Mondol, T. Alamb, R. Banerjee, S. Kumar, K. Chattopadhyay. Development of a high temperature high strength Al alloy by addition of small amounts of Sc and Mg to 2219 alloy. Materials Science & Engineering, 2017, vol. 687, pp. 221–231.

14. M. Li, Q. Pan, Y. Shi, X. Sun, H. Xiang. High strain rate superplasticity in an Al–Mg–Sc–Zr alloy processed via simple rolling. Materials Science & Engineering, 2017, vol. 687, pp. 298–305.

15. Buranova Yu., Kulitskiy V., Peterlechner M., Mogucheva A., Kaibyshev R., Divinski S.V., Wilde G. Al3(Sc, Zr)-based precipitates in Al-Mg alloy: Effect of severe deformation. Acta Materialia, 2017, vol. 124, pp. 210–224.

16. Baranov V.N., Sidelnikov S.B., Bezrukikh A.I., Zenkin E.Yu. Research of rolling regimes and mechanical properties of cold-rolled, annealed and welded semi-finished products from experimental alloys of Al–Mg system, economically alloyed by scandium. Tsvetnye Metally [Non-ferrous metals], 2017, no. 9, рр. 91–96. (In Russ.)

17. Baranov V.N., Sidelnikov S.B., Zenkin E.Yu., Bezrukikh A.I., Sokolov R.E., Konstantinov I.L., Voroshilov D.S., Belokonova I.N., Yakivyuk O.V. Research on mechanical properties of semi-finished products from an aluminum-scandium alloy. Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki. [Proceedings of Tula State University. Technical Sciences.], no. 11, part 1. Tula: TulGU, 2017, pp. 147–153. (In Russ.)

18. Vladimir Baranov, Sergey Sidelnikov, Evgeny Zenkin, Viktor Frolov, Denis Voroshilov, Olga Yakivyuk, Igor Konstantinov, Ruslan Sokolov, Irina Belokonova. Study of strength properties of semi-finished products from economically alloyed high-strength aluminium-scandium alloys for application in automobile transport and shipbuilding. Open Engineering, no. 8, 2018, pp. 69–76.

19. Vladimir Baranov, Sergey Sidelnikov, Evgeniy Zenkin, Olga Yakivyuk. Physical modeling technological regimes of production deformed semi-finished products from experimental aluminium alloys alloyed by scandium. Materials Science Forum, 2018, pp. 54–62.

20. Baranov V.N., Sidelnikov S.B., Zenkin E.Yu., Voroshilov D.S. Developing modes to produce deformed semi-finished products from experimental scandium-containing aluminum alloy and studying their mechanical properties. Tsvetnaya metallurgiya. Izvestiya vysshikh uchebnykh zavedeniy [Nonferrous metallurgy. Universities’ proceedings], 2018, no. 2, pp. 43–49. (In Russ.)