Abstract:
The effect of small additions of copper on the microstructure and physic-mechanical properties of an ultrafine-grained Al-1.47Cu-0.34Zr (wt%) alloy structured by high pressure torsion after preliminary annealing at 375∘∘C for 140 h has been studied. As a result of processing, high values of strength characteristics (conditional yield strength 430 MPa, ultimate tensile strength 574 MPa) with an acceptable level of electrical conductivity (46.1% IACS) and ductility (elongation to fracture ∼∼ 5%) have been achieved. On the basis of the microstructural parameters determined by X-ray diffraction analysis and transmission electron microscopy, hardening mechanisms responsible for such high strength have been analyzed. It was shown that Cu plays the key role in strengthening. The addition of copper significantly contributes to grain refinement and, consequently, to grain-boundary hardening. Alloying with copper leads to significant additional hardening (∼∼ 130 MPa) in the ultrafine-grained alloy, which is not typical for coarse-grained state. Segregation of Cu at grain boundaries and the formation of Cu nanoclusters are the most probable reasons for this hardening.
Citation:
T. S. Orlova, D. I. Sadykov, M. Yu. Murashkin, V. U. Kazykhanov, N. A. Enikeev, “Peculiarities of strengthening of Al-Cu-Zr alloy structured by severe plastic deformation”, Fizika Tverdogo Tela, 63:10 (2021), 1572–1584; Phys. Solid State, 63:12 (2021), 1744–1756
\Bibitem{OrlSadMur21}
\by T.~S.~Orlova, D.~I.~Sadykov, M.~Yu.~Murashkin, V.~U.~Kazykhanov, N.~A.~Enikeev
\paper Peculiarities of strengthening of Al-Cu-Zr alloy structured by severe plastic deformation
\jour Fizika Tverdogo Tela
\yr 2021
\vol 63
\issue 10
\pages 1572--1584
\mathnet{http://mi.mathnet.ru/ftt7993}
\crossref{https://doi.org/10.21883/FTT.2021.10.51408.104}
\elib{https://elibrary.ru/item.asp?id=46598575}
\transl
\jour Phys. Solid State
\yr 2021
\vol 63
\issue 12
\pages 1744--1756
\crossref{https://doi.org/10.1134/S1063783421100280}
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This publication is cited in the following 6 articles:
E. A. Sviridova, S. V. Vasiliev, A. I. Limanovskii, V. N. Varyukhin, V. I. Tkatch, “Mechanisms of Strengthening Aluminum Foils Consolidated by the High-Pressure-Torsion Technique”, J. Surf. Investig., 18:3 (2024), 623
E. A. Sviridova, S. V. Vasiliev, A. I. Limanovsky, V. N. Varyukhin, V. I. Tkach, “Mechanisms of Strengthening Aluminum Foils Consolidated by High-Pressure Torsion Technique”, Poverhnostʹ. Rentgenovskie, sinhrotronnye i nejtronnye issledovaniâ, 2024, no. 5, 101
T.S. Orlova, M.Yu. Gutkin, “Effects of Hardening by Annealing and Softening by Additional Plastic Deformation in Ultrafine-Grained Al and Al-Based Alloys: Brief Review”, Rev. Adv. Mater. Technol., 5:2 (2023), 32
T.S. Orlova, D.I. Sadykov, D.V. Danilov, M.Yu. Murashkin, “Influence of decreased temperature on the plasticization effect in high-strength Al-Cu-Zr alloy”, Journal of Alloys and Compounds, 931 (2023), 167540
Vasiliy Krasnikov, Alexander Mayer, Polina Bezborodova, Marat Gazizov, “Effect of Copper Segregation at Low-Angle Grain Boundaries on the Mechanisms of Plastic Relaxation in Nanocrystalline Aluminum: An Atomistic Study”, Materials, 16:8 (2023), 3091
T.S. Orlova, D.I. Sadykov, D.V. Danilov, N.A. Enikeev, M.Yu. Murashkin, “Ultrafine-grained Al-Cu-Zr alloy with high-strength and enhanced plasticity”, Materials Letters, 303 (2021), 130490
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