Abstract
The effect of the temperature of uniaxial tensile test on the plastification effect (PE) of ultrafine-grained (UFG) Al–1.5Cu (wt %) alloy is studied for the first time. The UFG structure in a material is formed by high-pressure torsion (HPT). A significant increase in the plasticity of an UFG alloy from ~3 to 22% while retaining a high ultimate tensile strength (450 MPa) is achieved due to additional thermomechanical treatment including short-term low-temperature annealing and subsequent small HPT deformation. The temperature range of the PE implementation is revealed. It is shown that a decrease in the deformation temperature results in a gradual decrease in the PE and its disappearance at –20°C. Copper doping results in significant narrowing of the PE implementation range from the low-temperature side in comparison with the UFG Al case. The possible causes of the effect of Cu doping on the temperature dependence of the PE is discussed.
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ACKNOWLEDGMENTS
X-ray diffraction studies were performed using the equipment of the Research Centre for X-ray Diffraction Studies of the St. Petersburg State University.
Funding
A.M. Mavlyutov and E.Kh. Yapparova acknowledge the support of the Russian Science Foundation (project no. 19-79-00114).
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Mavlyutov, A.M., Orlova, T.S., Yapparova, E.K. et al. Influence of Deformation Temperature on the Effect of High Plasticity Implementation in Ultrafine-Grained Al–1.5Cu Alloy. Phys. Solid State 63, 1730–1738 (2021). https://doi.org/10.1134/S1063783421100255
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DOI: https://doi.org/10.1134/S1063783421100255