Temperature dependence of friction and wear in nanostructured shape memory alloy Ti49.3Ni50.7

Получена 03 июля 2025; Принята 05 ноября 2025;
Эта работа написана на английском языке
Цитирование: A.A. Dmitrievskiy, V.V. Stolyarov. Temperature dependence of friction and wear in nanostructured shape memory alloy Ti49.3Ni50.7. Письма о материалах. 2025. Т.15. №4. С.369-375
BibTex   https://doi.org/10.48612/letters/2025-4-369-375

Аннотация

The regularities of the change in the friction coefficient Kf and wear rate W of the nanostructured Ti49.3Ni50.7 shape memory alloy with an increase in the test temperature are established. It is shown that the changes in Kf and W are caused by thermally induced phase transformations. The temperature Md is determined for the alloy under study.The temperature dependence of friction and wear of nanostructured alloy Ti49.3Ni50.7 obtained by severe plastic deformation is investigated. The friction coefficient (Kf) and wear rate (W) are investigated under conditions of reciprocating motion and the absence of lubrication in the temperature range (25°C ≤ Т ≤140°C) corresponding to two-phase (A+M) and single-phase (A) states. It is shown that the minimum friction conditions in the range ensure the absence of a temperature flash in the contact area and allow us to state that the friction coefficient, wear intensity and volume lost by the counterbody linear increase with temperature change in the range of 25 – 90°С and are drawn on a plateau at temperature Md. With an increase in the tribocontact temperature, the running-in stage is reduced. The change in friction characteristics is associated with the ratio of martensite and austenite content.

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Финансирование на английском языке

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