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

— 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 reg...

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Bibliographic Details
Published in:Physics of metals and metallography 2021-01, Vol.122 (1), p.60-66
Main Authors: Morozova, A. I., Belyakov, A. N., Kaibyshev, R. O.
Format: Article
Language:English
Subjects:
Age hardening
Chemical precipitation
Chemistry and Materials Science
Chromium
Copper
Decomposition
Deformation effects
Dislocation density
Equal channel angular pressing
Grain size
Hardenability
Materials Science
Mechanical properties
Metallic Materials
Physical properties
Plastic deformation
Solid solutions
Strength and Plasticity
Ultrafines
Zirconium base alloys
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Summary:— 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.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X21010087