Electrometallurgy Today, 2025, №01

2025 №01 (08)

DOI of Article 10.37434/sem2025.01.09

2025 №01 (01)

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"Suchasna Elektrometallurgiya" (Electrometallurgy Today), 2025, #1, 51-57 pages

Microstructure of the Ti–Zr–Nb system alloy obtained by the WAAM method with a metal powder wire

S.L. Schwab¹, R.V. Selin¹, M.M. Voron^2,3, V.Yu. Bilous¹, I.K. Petrichenko¹, L.M. Radchenko¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: serg.schwab@gmail.com
²Physical and Technological Institute of Metals and Alloys of the NAS of Ukraine. 34/1 Academician Vernadsky Blvd, 03680, Kyiv, Ukraine,
³National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» 37 Prospect Beresteiskyi, 03056, Kyiv, Ukraine

Abstract
The work is devoted to studying the Ti–Zr–Nb system (α+β)-alloy for biomedical applications, obtained by the WAAM method. A metal powder wire with Ti–13Zr–13Nb alloy core was used as a filler material. As a result of the work, a sample of the Ti–7Zr–7Nb composition was obtained. The possibility of homogeneous structure formation in samples obtained by the WAAM method from two-phase titanium alloys of the Ti–Zr–Nb system for biomedical purposes is shown. At the same time, the classical formation of the macrostructure is preserved, which depends on the conditions and direction of heat removal, which contributes to the formation of columnar crystals. It is shown that when forming deposited layers, there is a possibility of weak anisotropy of the properties due to an incompletely homogeneous structure. However, the small sizes of the columnar crystals in the upper part of the sample eliminate such a drawback. The uniform formation of the microstructure after phase recrystallization in all the zones of the deposited metal is shown, which is characterized by the presence of dispersed quenching structures similar to the αʹ-phase, 1 μm wide in the center of the macrograins. In the extreme regions of the macrograins, plates of larger sizes of about 2 μm are observed. Such structural-phase characteristics are favorable for ensuring further structural changes and achieving a high level of mechanical properties of additively obtained products after final heat treatment. 17 Ref., 1 Tabl., 7 Fig.
Keywords: titanium alloys, medical purpose, Ti–13Zr–13Nb, Ti–7Zr–7Nb, WAAM, deposited layers, microstructure

Received: 22.01.2025
Received in revised form: 04.02.2025
Accepted: 20.02.2025

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