Effect of equal channel angular pressing on the structure and mechanical properties of new Ti–10Mo–8Nb–6Zr β-Ti alloy
https://doi.org/10.17073/0021-3438-2022-6-49-57
Abstract
This paper presents comparative studies of the structural and mechanical properties of the new Ti–10Mo–8Nb–6Zr β-Ti alloy subjected to traditional cold rotary forging and equal channel angular pressing (ECAP) at 250 °C. The main phase in the initial hardened state after forging and ECAP is the BCC β phase. A broadening of the β phase X-ray lines and TEM data indicate a reduction in the structure and an increase in the concentration of lattice defects after deformation treatments. In the initial state, the alloy has an ultimate tensile strength of about 700 MPa, offset yield strength of 450 MPa and elongation at break of ~30 %. As a result of forging, the ultimate tensile strength and offset yield strength of the alloy increase to 1230 and 950 MPa, and after ECAP – to 1280 and 1270 MPa, respectively. At the same time, the elongation is reduced to 6 % after ECAP. A significant increase in the strength of the Ti–10Mo–8Nb–6Zr alloy after ECAP makes it more promising for use in medicine.
Keywords
Supporting agencies: The research was funded by RFBR BRICS_т Project No. 19-58-80018 (TEM studies) and Russian Science Foundation Project No. RSF 20-69-47029 (ECAP, XRS studies). The authors thank the Nanotech Common Use Center of the Ufa State Aviation Technical University (http://nanotech.ugatu.ac.ru)
About the Authors
D. V. Gunderov
Institute of Molecule and Crystal Physics of the Ufa Federal Research Center of the Russian Academy of Sciences; Ufa University of Science and Technology
Russian Federation
Russian Federation
Dr. Sci. (Phys.-Math.), leading researcher; leading researcher
450054, Ufa, pr. Oktyabrya, 71
450076, Ufa, Zaki Validi str., 32
A. A. Churakova
Institute of Molecule and Crystal Physics of the Ufa Federal Research Center of the Russian Academy of Sciences; Ufa University of Science and Technology
Russian Federation
Russian Federation
Cand. Sci. (Phys.-Math.), research associate; senior researcher
Ufa
A. V. Polyakov
Ufa University of Science and Technology; Perm National Research Polytechnic University
Russian Federation
Russian Federation
Cand. Sci. (Eng.), senior researcher; Senior researcher
Ufa
614990, Perm, Komsomolskii pr., 29
A. G. Raab
Ufa University of Science and Technology
Russian Federation
Russian Federation
Cand. Sci. (Eng.), research associate
Ufa
S. D. Gunderova
Ufa University of Science and Technology
Russian Federation
Russian Federation
student
Ufa
Yu. A. Lebedev
Institute of Molecule and Crystal Physics of the Ufa Federal Research Center of the Russian Academy of Sciences
Russian Federation
Russian Federation
Cand. Sci. (Eng.), senior researcher
Ufa
Ana Paula Rosifini Alves Claro
São Paulo State University
Brazil
Brazil
prof.
São Paulo
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Review
For citations:
Gunderov D.V., Churakova A.A., Polyakov A.V., Raab A.G., Gunderova S.D., Lebedev Yu.A., Rosifini Alves Claro A. Effect of equal channel angular pressing on the structure and mechanical properties of new Ti–10Mo–8Nb–6Zr β-Ti alloy. Izvestiya. Non-Ferrous Metallurgy. 2022;28(6):49-57. (In Russ.) https://doi.org/10.17073/0021-3438-2022-6-49-57
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