Effect of equal channel angular pressing on the structure and mechanical properties of new Ti–10Mo–8Nb

Effect of equal channel angular pressing on the structure and mechanical properties of new Ti–10Mo–8Nb–6Zr β-Ti alloy

Published:2022-12-07 Issue:6 Volume:28 Page:49-57
ISSN:2412-8783
Container-title:Izvestiya Vuzov. Tsvetnaya Metallurgiya (Universities' Proceedings Non-Ferrous Metallurgy)
language:
Short-container-title:Izv.VUZ. Tsvet. Met.

Author:

Gunderov D. V.¹,Churakova A. A.¹,Polyakov A. V.²,Raab A. G.³,Gunderova S. D.³,Lebedev Yu. A.⁴,Rosifini Alves Claro Ana Paula⁵

Affiliation:

1. Institute of Molecule and Crystal Physics of the Ufa Federal Research Center of the Russian Academy of Sciences; Ufa University of Science and Technology

2. Ufa University of Science and Technology; Perm National Research Polytechnic University

3. Ufa University of Science and Technology

4. Institute of Molecule and Crystal Physics of the Ufa Federal Research Center of the Russian Academy of Sciences

5. São Paulo State University

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.

Publisher

National University of Science and Technology MISiS

Subject

Metals and Alloys

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