Abstract—The evolution of the microstructure and phase composition of the eutectic Al–Zn–Mg–Fe–Ni alloy subjected to severe plastic deformation by high pressure torsion has been investigated during annealing. The deformation treatment has resulted in a composite with a nanostructured matrix, namely, an Al solid solution alloyed with zinc and magnesium, and comprising submicron Al9FeNi aluminides. The sequence and the kinetics of post-deformation processes (recovery, aging, recrystallization) during the heating of the alloy to 400°C have been established. Heating to 200°C has been shown to preserve the nanostructural state and the high hardness (1100 MPa) of the alloy due to recovery and aging processes taking place simultaneously. The tendency to recrystallization increases with increasing temperature; and static recrystallization becomes the main relaxation process accompanied by grain growth (to 30 µm) and a decrease in hardness.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
N. A. Belov, E. A. Naumova, and T. K. Akopyan, Eutectic Alloys Based on Aluminum: New Systems of Alloying (ID “Ruda i metally”, Moscow, 2016) [in Russian].
N. A. Belov, E. A. Naumova, and T. K. Akopyan, “Eutectic alloys based on the Al–Zn–Mg–Ca system: microstructure, phase composition and hardening,” Mater. Sci. Technol. 33, 656–666 (2017).
N. A. Belov and V. S. Zolotorevskii, “Casting alloys based on aluminum-nickel eutectic (nikalin) as a possible alternative to silumin,” Tsv. Metally, No. 2, 99–105 (2003).
T. K. Akopyan, A. G. Padalko, N. A. Belov, and Zh. A. Karpova, “Effect of barothermal treatment on the structure and the mechanical properties of a high-strength eutectic Al–Zn–Mg–Cu–Ni aluminum alloy,” Metally 2017, 922–927 (2017).
P. K. Shurkin, N. A. Belov, T. K. Akopyan, A. N. Alabin, A. S. Aleshchenko and N. N. Avxentieva, “Formation of the structure of thin-sheet rolled product from a high-strength sparingly alloyed aluminum alloy “Nikalin”,” Phys. Met. Metallogr. 118, 896–904 (2017).
T. K. Akopyan, A. S. Aleshchenko, N. A. Belov and S. P. Galkin, “Effect of radial–shear rolling on the formation of structure and mechanical properties of Al–Ni and Al–Ca aluminum–matrix composite alloys of eutectic type,” Phys. Met. Metallogr. 119, 241–250 (2018).
A. N. Petrova, I. G. Brodova, S. V. Razorenov, E. V. Shorokhov, and T. K. Akopyan, “Mechanical properties of Al–Zn–Mg–Fe–Ni alloy of eutectic-type at different strain rates,” Phys. Met. Metallogr. 120, 1221–1227 (2019).
Y. H. Zhao, Z. Jin, X. Z. Liao, R. Z. Valiev, and Y. T. Zhu, “Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing,” Acta Mater. 52, 4589–4599 (2004).
I. G. Brodova, I.G. Shirinkina, A. N. Petrova, E. V. Shorokhov, and P. A. Nasonov, “On the dispersion of the structure of the B95 aluminum alloy by different methods of severe plastic deformation,” Persp. Mater., No. 12, 60–65 (2011).
S. V. Krymskii, P. A. Nikulin, M. Yu. Murashkin, and M. V. Markushev, “Strength of intensely plastically deformed and dispersively hardened Al–Zn–Mg–Cu–Sc–Zr alloy,” Pis’ma Mater. 1, 167–170 (2011).
A. R. Jones and N. Hansen, “The interaction between particles and low angle boundaries during recovery of aluminum-aluminum alloys,” Acta Metall. 29, 509–599 (1981).
C. J. Tweed, B. Ralph, and N. Hansen, “The pinning by particles of low and high angle grain growth,” Acta Metall. 32, 1407–1414 (1984).
E. V. Kozlov, A. M. Glezer, N. A. Koneva, N. A. Popova, and I. A. Kuzina, Fundamentals of Plastic Deformation of Nanostructured Materials (Fizmatlit, Moscow, 2016) [in Russian].
Yu. G. Krasnoperova, M. V. Degtyarev, L. M. Voronova, and T. I. Chashchukhina, “Effect of annealing temperature on the recrystallization of nickel with different ultradisperse structures,” Phys. Met. Metallogr. 117, 267–274 (2016).
I. G. Shirinkina and I. G. Brodova, “Structure evolution of submicrocrystalline aluminium alloy during annealing,” Deform. Razr. Mater., No. 12, 27–33 (2016).
ACKNOWLEDGMENTS
We thank T.K. Akopyan for the preparation and heat treatment of the ingots. The electron microscopic studies were performed at the Center of the Collaborative Access “Test Center of Nanotechnologies and Advanced Materials,” Institute of Metal Physics, Ural Branch, Russian Academy of Sciences.
Funding
This work was performed within the scope of a State Task of the Ministry of Education and Science of the Russian Federation (theme “Struktura,” no. АААА-А18-118020190116-6) and supported in part by the Russian Foundation for Basic Research (project no. 18-10-03-00102).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by T. Gapontseva
Rights and permissions
About this article
Cite this article
Shirinkina, I.G., Brodova, I.G. Annealing-Induced Structural–Phase Transformations in an Al–Zn–Mg–Fe–Ni Alloy after High Pressure Torsion. Phys. Metals Metallogr. 121, 344–351 (2020). https://doi.org/10.1134/S0031918X20040134
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0031918X20040134