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Effect of Deformation Temperature on Formation of Ultrafine-Grained Structure in the Age-Hardenable Cu–Cr–Zr Alloy

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Abstract—

The effect of the temperature of plastic deformation performed by equal channel angular pressing on the structure and physical and mechanical properties of the age-hardenable Cu–Cr–Zr alloy has been studied. Plastic deformation results in the formation of an ultrafine-grained structure in some regions with an average grain size smaller than 1 µm, a supersaturated solid solution decomposition, and the precipitation of disperse particles. The fraction of the supersaturated solid solution which is decomposed is shown to increase with increasing deformation temperature. The density of microshear bands, the dislocation density, and the fraction of high-angle boundaries and the ultrafine-grained structure increase with increasing volume fraction of disperse particles.

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ACKNOWLEDGMENTS

The authors are grateful to the personnel of the Joint Research Center, “Technology and Materials,” Belgorod National Research University, for their assistance with instrumental analysis.

Funding

The financial supports received from the Ministry of Science and Higher Education of the Russian Federation, under President grant no. 075-15-2020-407 for microstructure investigation, and from the Russian Science Foundation, Russia, under grant no. 19-79-30025 for mechanical property analysis, and financial support of the Ministry of Science and Higher Education of Russian Federation in the frame work of Increase Competitiveness Program of NUST “MISIS” are gratefully acknowledged.

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Correspondence to A. I. Morozova.

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Translated by T. Gapontseva

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Morozova, A.I., Belyakov, A.N. & Kaibyshev, R.O. Effect of Deformation Temperature on Formation of Ultrafine-Grained Structure in the Age-Hardenable Cu–Cr–Zr Alloy. Phys. Metals Metallogr. 122, 60–66 (2021). https://doi.org/10.1134/S0031918X21010087

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  • DOI: https://doi.org/10.1134/S0031918X21010087

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