I. Sabirov, N. A. Enikeev, M. Y. Murashkin, and R. Z. Valiev, Bulk Nanostructured Materials with Multifunctional Properties, 2015.

S. V. Dobatkin, J. Gubicza, D. V. Shangina, N. R. Bochvar, and N. Y. Tabachkova, High strength and good electrical conductivity in Cu-Cr alloys processed by severe plastic deformation, Mater. Lett, vol.153, pp.5-9, 2015.

R. K. Islamgaliev, K. M. Nesterov, J. Bourgon, Y. Champion, and R. Z. Valiev, Nanostructured Cu-Cr alloy with high strength and electrical conductivity, J. Appl. Phys, vol.115, pp.1-5, 2014.
URL : https://hal.archives-ouvertes.fr/hal-02489711

N. Nita, R. Schaeublin, M. Victoria, and R. Z. Valiev, Effects of irradiation on the microstructure and mechanical properties of nanostructured materials

M. , , vol.85, pp.723-735, 2005.

B. B. Straumal, S. G. Protasova, A. A. Mazilkin, O. A. Kogtenkova, L. Kurmanaeva et al., SPD-induced changes of structure and magnetic properties in the Cu-Co alloys, Mater. Lett, vol.98, pp.217-221, 2013.

B. B. Straumal, A. Mazilkin, B. Baretzky, G. Schütz, E. Rabkin et al., Accelerated Diffusion and Phase Transformations in Co-Cu Alloys Driven by the Severe Plastic Deformation, Mater. Trans, vol.53, pp.63-71, 2012.

R. Z. Valiev, R. K. Islamgaliev, and I. V. Alexandrov, Bulk nanostructured materials from severe plastic deformation, pp.7-9, 2000.

X. Sauvage, E. V. Bobruk, M. Y. Murashkin, Y. Nasedkina, N. A. Enikeev et al., Optimization of electrical conductivity and strength combination by structure design at the nanoscale in Al-Mg-Si alloys, Acta Mater, vol.98, pp.355-366, 2015.
URL : https://hal.archives-ouvertes.fr/hal-02142075

B. B. Straumal, A. R. Kilmametov, Y. Ivanisenko, A. A. Mazilkin, O. A. Kogtenkova et al., Phase transitions induced by evere plastic deformation: steady-state and equifinality, Int. J. Mater. Res, vol.106, pp.657-664, 2015.

B. B. Straumal, A. R. Kilmametov, A. Korneva, A. A. Mazilkin, P. B. Straumal et al., Phase transitions in Cu-based alloys under high pressure torsion, J. Alloys Compd, vol.707, pp.20-26, 2017.

Y. Nasedkina, X. Sauvage, E. V. Bobruk, M. Y. Murashkin, R. Z. Valiev et al., Mechanisms of precipitation induced by large strains in the Al-Cu system, J. Alloys Compd, vol.710, pp.736-747, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01766084

I. Sabirov and R. Pippan, Formation of a W-25%Cu nanocomposite during high pressure torsion, Scr. Mater, vol.52, pp.1293-1298, 2005.

S. Lee, Z. Horita, S. Hirosawa, and K. Matsuda, Age-hardening of an Al-Li-Cu-Mg alloy (2091) processed by high-pressure torsion, Mater. Sci. Eng. A, vol.546, pp.82-89, 2012.

A. Deschamps, F. De-geuser, Z. Horita, S. Lee, and G. Renou, Precipitation kinetics in a severely plastically deformed 7075 aluminium alloy, Acta Mater, vol.66, pp.105-117, 2014.
URL : https://hal.archives-ouvertes.fr/hal-00963756

I. F. Mohamed, S. Lee, K. Edalati, Z. Horita, S. Hirosawa et al., Aging Behavior of Al 6061 Alloy Processed by High-Pressure Torsion and Subsequent Aging, Metall. Mater. Trans. A Phys. Metall. Mater. Sci, vol.46, pp.2664-2673, 2015.

X. Sauvage, S. Lee, K. Matsuda, and Z. Horita, Origin of the influence of Cu or Ag micro-additions on the age hardening behavior of ultrafine-grained Al-Mg-Si alloys, J. Alloys Compd, vol.710, pp.199-204, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01766116

Y. Estrin and A. Vinogradov, Fatigue behaviour of light alloys with ultrafine grain structure produced by severe plastic deformation: An overview, Int. J. Fatigue, vol.32, pp.898-907, 2010.

M. H. Li, Y. Q. Yang, Z. Q. Feng, G. H. Feng, B. Huang et al.,

. Ru, Influence of equal-channel angular pressing on aging precipitation in 7050

A. Alloy, Intermetallics, vol.55, pp.49-55, 2014.

A. Guinier and P. Jacquet, Étude du Durcissement des alliages cuivre-glucinium, Rev. Métallurgie, vol.1, pp.1-16, 1944.

L. E. Tanner, The Be?Cu (Beryllium-Copper) system, Bull. Alloy Phase Diagrams, vol.8, pp.269-282, 1987.

J. R. Davis, Copper and Copper Alloys, 2001.

B. Ken, I. Shimizu, Y. Mikami, H. Mitani, and K. Otsuka, Electron Microscopy Study of the Precipitation Processes in Cu-2wt% Be Alloy

, Met, vol.12, pp.206-213, 1971.

S. Yamamoto, M. Mutsui, and Y. Murakami, Electron Microscopy Study of the Precipitation Sequence in Cu-Be Alloys, Trans. Japan Inst. Met, vol.12, pp.159-165, 1971.

A. Varschavsky and E. Donoso, A differential scanning calorimetrie study of precipitation in Cu-2Be, Thermochim. Acta, vol.266, pp.257-275, 1995.

R. Thomson and A. F. Crawley, Precipitation Hardening in Cu-Zn-Be Alloys, vol.7, pp.865-870, 1976.

H. Tsubakino, R. Nozato, and A. Yamamoto, Precipitation sequence for simultaneous continuous and discontinuous modes in Cu-Be binary alloys

. Technol, , vol.9, pp.288-294, 1993.

I. Lomakin, A. R. Arutyunyan, R. R. Valiev, F. A. Gadzhiev, and M. Y. Murashkin, Design and Evaluation of an Experimental Technique for Mechanical and Fatigue Testing of Sub-Sized Samples, vol.42, p.216, 2018.

Y. He, S. Godet, and J. J. Jonas, Representation of misorientations in Rodrigues-Frank space: Application to the Bain, Kurdjumov-Sachs, Nishiyama-Wassermann and Pitsch orientation relationships in the Gibeon meteorite, Acta Mater, vol.53, pp.1179-1190, 2005.

R. C. Lincoln, K. M. Koliwad, and P. B. Ghate, Morse-Potentials Evaluations of Second-and Third-Order Elastic Constants of Some Cubic Metals, Phys. Rev, vol.157, pp.463-466, 1967.

S. N. Alhajeri, A. I. Almazrouee, K. J. Al-fadhalah, and T. G. Langdon, Effect of Initial Annealing Temperature on Microstructural Development and Microhardness in High-Purity Copper Processed by High-Pressure Torsion, Adv. Eng. Mater, vol.20, pp.8-13, 2018.

H. Jiang, Y. T. Zhu, D. P. Butt, I. V. Alexandrov, and T. C. Lowe, Microstructural evolution, microhardness and thermal stability of HPT-processed Cu

. Eng, , vol.290, pp.128-138, 2000.

E. A. Brandes and G. B. Brooks, Smithells Metals Reference Book, 2013.

H. S. Kim, Y. Estrin, and M. B. Bush, Plastic deformation behaviour of fine-grained materials, Acta Mater, vol.48, pp.493-504, 2000.

Z. C. Cordero, B. E. Knight, and C. A. Schuh, Six decades of the Hall-Petch effect -a survey of grain-size strengthening studies on pure metals, Int. Mater. Rev, vol.61, pp.495-512, 2016.

W. F. Smith and J. Hashemi, Foundations of Materials Science and Engineering, 2006.

N. Hansen, Hall-Petch relation and boundary strengthening, Scr. Mater, vol.51, pp.801-806, 2004.

J. M. Martin, Precipitation Hardening, Second, Butterworth-Heinemann, 1998.

H. Tsubakino and R. Nozato, Discontinuous Precipitation in Cu-Be Alloys Containing Cobalt, J. Japan Inst. Met, vol.44, pp.131-138, 1980.

H. S. Kim, S. I. Hong, and S. J. Kim, On the rule of mixtures for predicting the mechanical properties of composites with homogeneously distributed soft and hard particles, J. Mater. Process. Technol, vol.112, pp.109-113, 2001.

, Fig. 3. (a) STEM BF and (b) STEM HAADF images of the Cu-2Be alloy