MATERIALS SCIENCE AND ENGINEERING

Atypical intrinsic Elinvar behavior of β Ti−22Nb−6Zr alloy in high and wide temperature range

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  • a National University of Science and Technology “MISIS”, Laboratory of Shape Memory Alloys, 4 Leninskiy prospect, Moscow, Russia;

    b Tula State University, Department of Engineering and Materials Science, 92 Lenina prospect, Tula, Russia;

    c Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Russia;

    d Joint Institute for High Temperatures of RAS, 13 Bd. 2 Izhorskaya Street, Moscow, Russia;

    e National Research University Higher School of Economics, Faculty of Physics, 20 Myasnitskaya Street, Moscow, Russia;

    f Interdisciplinary Centre for Advanced Materials Simulation, Ruhr University Bochum, Germany;

    g National University of Science and Technology “MISIS”, Department of Physical Metallurgy of Non-Ferrous Metals, 4 Leninskiy prospect, Moscow, Russia;

    National University of Science and Technology “MISIS”, Ultrafine-grained Metallic Materials Laboratory, 4 Leninskiy prospect, Moscow, Russia;

    i École de Technologie Supérieure, 1100 Notre-Dame Street West, Montreal, Canada

Online published: 2026-06-08

Abstract

The Elinvar behavior of Ti−22Nb−6Zr shape memory alloy was studied to determine the mechanism of such behavior and find the way to control this effect. The temperature dependences of elastic properties were studied using torsional pendulum experiments. The stability of phase composition was evaluated by X-ray diffraction analysis. Compression mechanical testing and classical atomistic simulations were used to confirm the obtained results on the macroscopic and atomic levels. The heating/cooling rate of ≥9 °C/min allows realization of the two-way Elinvar behavior in the 150−550 °C range with a temperature coefficient of fr2 ~10−5 °C−1; this behavior is stable, repeatable, and independent of the β-phase state, whether the alloy has a polygonized dislocation substructure or a recrystallized structure. The study concludes that the Elinvar behavior observed is an intrinsic property of ВСС β-phase.

Cite this article

Sergey DUBINSKIY, Alexandra BARANOVA, Galina MARKOVA, Anastasia ZELENINA, Lada KOLOTOVA, Sergey STARIKOV, Andrey KOROTITSKIY, Andrey BAZLOV, Sergey PROKOSHKIN, Vladimir BRAILOVSKI . Atypical intrinsic Elinvar behavior of β Ti−22Nb−6Zr alloy in high and wide temperature range[J]. Transactions of Nonferrous Metals Society of China, 2026 , 36(5) : 1479 -1492 . DOI: 10.1016/S1003-6326(26)67042-2

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