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The Effect of Annealing and Additional Deformation on the Mechanical Properties of Ultrafine-Grained Al–1.5Cu Alloy

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Abstract

We studied mechanical properties of the ultrafine-grained (UFG) alloy of Al–1.5 Cu (wt %). UFG structure has been formed by processing the alloy by high-pressure torsion (НРТ). The UFG alloy shows high values of microhardness (1690 MPa), yield stress (515 MPa), and ultimate tensile strength (655 MPa), but low ductility (~3%). Short-term annealing at 150°C and the subsequent small HPT deformation of 0.25 turns at RT have led only to a slight decrease in the alloy should be replaced by strength to 450 MPa, which was ~70% of the value before annealing, but provided high plasticity (~22%). This implies a high potential for practical application of the alloy under study. The proposed approach may serve as a universal effective way to achieve a combination of high strength and high plasticity for various UFG materials.

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Funding

A. Mavlyutov thanks the Russian Science Foundation (grant no. 19-79-00114) for financial support of this work.

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Authors and Affiliations

  1. St. Petersburg State University, 199034, St. Petersburg, Russia

    A. M. Mavlyutov & E. Kh. Yapparova

  2. Ioffe Physical Technical Institute, Russian Academy of Science, 194021, St. Petersburg, Russia

    T. S. Orlova

  3. St. Petersburg University of Information Technologies, Mechanics, and Optics (ITMO University), 197101, St. Petersburg, Russia

    T. S. Orlova

Authors
  1. A. M. Mavlyutov
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  2. T. S. Orlova
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  3. E. Kh. Yapparova
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Corresponding author

Correspondence to T. S. Orlova.

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Translated by N. Petrov

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Mavlyutov, A.M., Orlova, T.S. & Yapparova, E.K. The Effect of Annealing and Additional Deformation on the Mechanical Properties of Ultrafine-Grained Al–1.5Cu Alloy. Tech. Phys. Lett. 46, 916–920 (2020). https://doi.org/10.1134/S1063785020090266

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  • DOI: https://doi.org/10.1134/S1063785020090266

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