vestiftИзвестия Национальной академии наук Беларуси. Серия физико-технических наукProceedings of the National Academy of Sciences of Belarus. Physical-technical series1561-83582524-244XThe Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8358-2024-69-2-95-105vestift-835Research ArticleМАТЕРИАЛОВЕДЕНИЕ, МЕТАЛЛУРГИЯMATERIALS SCIENCES AND ENGINEERING, METALLURGYСтруктура и свойства поверхностного слоя TiNi-сплава, подвергнутого ионно-плазменной и ультразвуковой обработкеStructure and properties of surface layer of TiNi alloy subjected to ion-plasma- and ultrasonic treatmenthttps://orcid.org/0000-0002-0350-1180РубаникВ. В.RubanikV. V.

Рубаник Василий Васильевич – член-корреспондент Национальной академии наук Беларуси, доктор технических наук, профессор, заведующий лабораторией физики металлов

пр. Генерала Людникова, 13, 210009, Витебск

Vasili V. Rubanik – research planning, generalization of the research results, formulation of conclusions

13, General Lyudnikov Ave., 210009, Vitebsk

v.v.rubanik@tut.byhttps://orcid.org/0009-0009-2632-5464БагрецД. А.BahretsD. A.

Багрец Дмитрий Александрович – кандидат технических наук, доцент, ученый секретарь

пр. Генерала Людникова, 13, 210009, Витебск

Dzmitry A. Bahrets – analysis and generalization of literature data, investigation of the structure and properties of the obtained samples, comparative analysis of the experimental data, writing and formatting the text of the manuscript

13, General Lyudnikov Ave., 210009, Vitebsk

bagurets@gmail.comhttps://orcid.org/0000-0002-9268-0167РубаникВ. В.RubanikV. V.

Рубаник Василий Васильевич (мл.) – доктор технических наук, профессор, директор

пр. Генерала Людникова, 13, 210009, Витебск

Vasili V. Rubanik (jr.) – development of research methodology, editing the text of the manuscript

13, General Lyudnikov Ave., 210009, Vitebsk

ita@vitebsk.byУрбанВ. И.UrbanV. I.

Урбан Вадим Иванович – младший научный сотрудник

пр. Генерала Людникова, 13, 210009, Витебск

Vadzim I. Urban – ion-plasma- and ultrasonic treatment of TiNi-samples, working with graphic materials

13, General Lyudnikov Ave., 210009, Vitebsk

vadik.urban1995@mail.ruИнститут технической акустики Национальной академии наук БеларусиInstitute of Technical Acoustics of the National Academy of Sciences of Belarus20240907202469295105Copyright © Рубаник В.В., Багрец Д.А., Рубаник В.В., Урбан В.И., 20242024Рубаник В.В., Багрец Д.А., Рубаник В.В., Урбан В.И.Rubanik V.V., Bahrets D.A., Rubanik V.V., Urban V.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestift.belnauka.by/jour/article/view/835

Проведено исследование морфологии, элементного состава, микротвердости и коррозионных свойств поверхностного слоя сплава TiNi после комбинированной обработки, которая включала ионно-плазменное (вакуумно-дуговым методом) осаждение TiN-покрытия и ультразвуковую обработку (УЗО) с различным количеством проходов (n). С использованием сканирующей электронной микроскопии установлено, что ультразвуковая обработка способствует существенному снижению количества капельной фазы на поверхности TiN-покрытия, однако с увеличением числа проходов при УЗО наблюдается нарушение сплошности TiN-покрытия в локальных точках. Исследовано влияние комбинированной обработки образцов TiNi на микротвердость и выявлен синергетический эффект двух упрочняющих технологий, который заключается в увеличении микротвердости сплава TiNi (1,6 ГПа в режиме поставки): за счет осаждения TiN-покрытия – до 10,9 ГПа, за счет последующей УЗО – от 14,5 до 18,4 ГПа в зависимости от количества проходов. Установлено, что для схемы УЗО + TiN величина потенциала коррозии Ecorr практически не зависит от числа проходов, составляет порядка –250 мВ и определяется величиной потенциала TiNпокрытия. Для схемы TiN + УЗО выявлено, что с увеличением числа проходов величина Ecorr смещается в сторону более отрицательных значений, приближаясь к значению потенциала коррозии TiNi в состоянии поставки (–350 мВ). С использованием метода сканирующего вибрирующего зонда (SVET) для образцов, подвергнутых обработке УЗО + TiN и TiN + УЗО (n = 1), выявлена высокая электрохимическая совместимость материалов основы (TiNi) и покрытия (TiN) в хлоридной среде с минимальными флуктуациями плотности тока. На основании полученных экспериментальных данных предложен технологический процесс обработки сплава TiNi по схеме TiN + УЗО (n = 1), позволяющий достичь синергетического эффекта упрочнения поверхностного слоя сплава TiNi в сочетании с высокими коррозионными свойствами и улучшенной морфологией поверхности.

The paper presents the results of research on morphology, elemental composition, microhardness, corrosion properties of the surface layer of TiNi alloy subjected to ion-plasma (vacuum-arc method) deposition of TiN coating and ultrasonic treatment (UT) with different number of passes (n). The SEM method showed that ultrasonic treatment provides a significant reduction in the amount of the droplet phase on the TiN coating surface. The surface discontinuity of TiN coating at local points was observed with an increase in the number of passes during ultrasonic treatment. The effect of combined processing methods on the microhardness of TiNi sample was studied. It was shown that the synergistic effect can be observed for two hardening methods. The combined strengthening method increased the microhardness of TiNi alloy (1.6 GPa in the as-received state): due to the deposition of a TiN coating – up to 10.9 GPa, due to subsequently ultrasonic treatment – up to 14.5–18.4 GPa depending on the number of passes. For UT + TiN scheme, it was shown that the open circuit potential Ecorr was about –250 mV which is practically independent of the number of passes and determined by the potential value of TiN coating. For TiN + UT scheme, it was found that with an increase in the number of passes, the value of Ecorr shifts towards more negative values approaching the open circuit potential value of the TiNi sample in the as-received state (–350 mV). The analysis of Scanning Vibrating Electrode Technique (SVET) results showed high electrochemical compatibility of substrate (TiNi) and coating (TiN) materials in a chloride environment with minimal current density fluctuations for the samples subjected to UT + TiN and TiN + UT (n = 1). The proposed method for TiNi alloy treatment according to TiN + UT scheme (n = 1) promotes an improvement of surface morphology and corrosion resistance.

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The authors declare that there are no conflicts of interest present.