Microstructure and Mechanical Performance of Ti–20Nb–xTa (x = 5–9 at %) Alloys

IF 0.3 Q4 METALLURGY & METALLURGICAL ENGINEERING

Russian Metallurgy (Metally) Pub Date : 2026-10-06 DOI:10.1134/S0036029526700941

A. S. Baikin, S. V. Konushkin, E. O. Nasakina, M. A. Kaplan, V. K. Zhidkov, Ya. A. Morozova, M. A. Sudarchikova, K. V. Sergienko, M. A. Sevost’yanov, A. G. Kolmakov

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引用次数: 0

Abstract‒The influence of tantalum (5–9 at %) and type of thermal treatment on the phase composition, microstructure, and mechanical performance of biocompatible Ti–20Nb–Ta alloys has been studied. It has been found that quenching from 800°C considerably increases the α"-martensite fraction in alloys containing 5–7 at % Ta. The martensite fraction is maximal (89.5%) in Ti–20Nb–7Ta alloy. In alloys with 8–9 at % Ta, the stable β-phase has observed after quenching. It has been shown that quenched Ti–20Nb–6Ta and Ti‒20Nb–7Ta alloys demonstrate the highest ductility (elongation about 22%) and Ti–20Nb–7Ta and Ti‒20Nb–8Ta alloys have the lowest yield stress (206 and 170 MPa, respectively). In cyclic tests, Ti–20Nb–7Ta alloy shows the best superelasticity behavior. This fact, in combination with optimal mechanical properties, makes this alloy promising for medical implants.

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Ti-20Nb-xTa （x = 5-9 at %）合金的组织与力学性能

摘要：研究了钽（5-9 at %）和热处理方式对生物相容性Ti-20Nb-Ta合金相组成、显微组织和力学性能的影响。研究发现，在800℃淬火时，含有5-7 % Ta的合金的α"-马氏体分数显著增加。Ti-20Nb-7Ta合金中马氏体分数最大（89.5%）。在% Ta含量为8-9的合金中，淬火后观察到稳定的β相。结果表明，淬火后的Ti-20Nb-6Ta和Ti-20Nb-7Ta合金具有最高的延展性（伸长率约为22%），Ti-20Nb-7Ta和Ti-20Nb-8Ta合金具有最低的屈服应力（分别为206和170 MPa）。在循环试验中，Ti-20Nb-7Ta合金表现出最佳的超弹性性能。这一事实，再加上最佳的机械性能，使得这种合金在医疗植入物方面很有前景。

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来源期刊

Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

0.70

自引率

25.00%

发文量

140

期刊介绍： Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.