Effect of various kinds of severe plastic deformation on the structure and electromechanical properties of precipitation-strengthened CuCrZr alloy
- Authors: Belyaeva A.I.1, Galuza A.A.2, Khaimovich P.A.3, Kolenov I.V.2, Savchenko A.A.1, Solodovchenko S.I.3, Shul’gin N.A.3
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Affiliations:
- National Technical University “Kharkov Polytechnic Institute,”
- Institute of Electrophysics and Radiation Technologies of NAS of Ukraine
- National Scientific Center “KIPT”
- Issue: Vol 117, No 11 (2016)
- Pages: 1170-1178
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/166449
- DOI: https://doi.org/10.1134/S0031918X16090027
- ID: 166449
Cite item
Abstract
The effect of various kinds of severe plastic deformation (equal-channel angular pressing and quasi-hydrostatic extrusion at 77 and 300 K) on the structural formation of precipitation-strengthened CuCrZr alloy has been studied. A combination of experimental methods has been used. Sputtering by deuterium ions was used as the tool for the layer-by-layer study of the alloy structure. The difference between the sputtering yields of the matrix (copper) and precipitates (Cr and Zr) allowed us to visualize the alloy structure to a total depth of 0.5−1 μm. The effect of severe plastic deformation on the precipitate distribution is considered. It has been shown that the main peculiarity of the microstructure is related to the high density of precipitates enriched in chromium, which completely determine the surface roughness. Their distribution is not related to the grain size. The combination of equal-channel angular pressing and quasi-hydrostatic extrusion was shown to lead to the increase in the microhardness of the CuCrZr alloy to 2300 MPa in the case of low-temperature quasi-hydrostatic extrusion (at 77 K) and to the retained high conductivity. It has been proved that the high anisotropy of precipitate shape, microhardness, and sputtering yield of the CuCrZr alloy is determined by equal-channel angular pressing.
About the authors
A. I. Belyaeva
National Technical University “Kharkov Polytechnic Institute,”
Author for correspondence.
Email: aibelyaeva@mail.ru
Ukraine, ul. Frunze 21, Kharkov, 610002
A. A. Galuza
Institute of Electrophysics and Radiation Technologies of NAS of Ukraine
Email: aibelyaeva@mail.ru
Ukraine, ul. Gudanova 13, Kharkov, 61024
P. A. Khaimovich
National Scientific Center “KIPT”
Email: aibelyaeva@mail.ru
Ukraine, ul. Akademicheskaya 1, Kharkov, 61000
I. V. Kolenov
Institute of Electrophysics and Radiation Technologies of NAS of Ukraine
Email: aibelyaeva@mail.ru
Ukraine, ul. Gudanova 13, Kharkov, 61024
A. A. Savchenko
National Technical University “Kharkov Polytechnic Institute,”
Email: aibelyaeva@mail.ru
Ukraine, ul. Frunze 21, Kharkov, 610002
S. I. Solodovchenko
National Scientific Center “KIPT”
Email: aibelyaeva@mail.ru
Ukraine, ul. Akademicheskaya 1, Kharkov, 61000
N. A. Shul’gin
National Scientific Center “KIPT”
Email: aibelyaeva@mail.ru
Ukraine, ul. Akademicheskaya 1, Kharkov, 61000