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"10.29235/1561-8358-2021-66-3-329-334vestift-684Research ArticleЭНЕРГЕТИКА, ТЕПЛО- И МАССООБМЕНPOWER ENGINEERING, HEAT AND MASS TRANSFERТермокинетическая ЭДС при обратном фазовом переходе в никелиде титана как способ записи информацииThermokinetic EMF during a reverse phase transition in titanium nickelide as a way of information recordingПетрова-БуркинаО. А.Petrova-BurkinaO. A.

Olga A. Petrova-Burkina – Junior Researcher, Laboratory of Metal Physics

13, General Lyudnikov Ave., Vitebsk,  210009

olchik.1987@mail.ruhttps://orcid.org/0000-0002-9268-0167Рубаник мл.В. В.Rubanik Jr.V. V.

Vasili V. Rubanik Jr. – D. Sc. (Engineering), Associate Professor, Director

13, General Lyudnikov Ave., Vitebsk, 210009

jr@tut.byhttps://orcid.org/0000-0002-0350-1180РубаникВ. В.RubanikV. V.

Vasili V. Rubanik – Corresponding Member of the National Academy of Sciences of Belarus, D. Sc. (Engineering), Head of the Laboratory of Metal Physics

13, General Lyudnikov Ave., Vitebsk, 210009

v.v.rubanik@tut.byИнститут технической акустики Национальной академии наук БеларусиInstitute of Technical Acoustics of the National Academy of Sciences of Belarus202108102021663329334Copyright © Петрова-Буркина О.А., Рубаник мл. В.В., Рубаник В.В., 20212021Петрова-Буркина О.А., Рубаник мл. В.В., Рубаник В.В.Petrova-Burkina O.A., Rubanik Jr. V.V., Rubanik V.V.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/684

Установлены закономерности влияния внешних факторов на термокинетическую ЭДС в образцах Ti – 50 ат.% Ni, а также разработан способ задания термокинетической ЭДС на определенных участках TiNi-проволоки. Термокинетическую ЭДС измеряли прямым способом с помощью цифрового милливольтметра МНИПИ В7-72. Деформирование участков проволочных образцов Ti – 50 ат.% Ni осуществляли на испытательной машине ИП 5158-5. На основании результатов калориметрических исследований исследовали кинетику мартенситных превращений. Установлено, что на величину термокинетической ЭДС Ti – 50 ат.% Ni при термоциклировании влияет степень прямого фазового перехода. Термоциклирование в интервале температур полного мартенситного превращения к 15-му термоциклу стабилизирует значения термокинетической ЭДС на 0,16 мВ. Тогда как термоциклирование в интервале температур неполного мартенситного превращения приводит к вырождению термокинетической ЭДС: к 70-му термоциклу она составляет 0,04 мВ. Увеличение температуры в зоне нагрева до 240 °С позволяет восстановить значение термокинетической ЭДС до 0,22 мВ, как и для случая отжига при температурах 400÷800 °С. Величина термокинетической ЭДС при термоциклировании связана с изменением физико-механических свойств сплава и характеризуется изменением стадийности и смещением характеристических температур фазового перехода. На основе полученных экспериментальных данных предложен способ целенаправленного задания протяженных участков TiNi-проволоки со значением термокинетической ЭДС от 0 до 0,6 мВ, используя различные способы воздействия (термоциклирование, деформирование, изменение температуры в зоне нагрева) на ее величину. Предлагаемое техническое решение может быть использовано в качестве способа записи информации.

The external factors that influence on the thermokinetic EMF value in the Ti – 50 at.% Ni samples were determined. A method for setting thermokinetic EMF in certain sections of the TiNi wire was developed. The thermokinetic EMF value was measured directly using a digital millivoltmeter MNIPI V7-72. The sections of the Ti – 50 at.% Ni wire samples were subjected to tensile tests on a tensile machine IP 5158-5. On the basis of calorimetric studies, the kinetics of martensitic transformations was investigated. It was found that the direct phase transition affects the thermokinetic EMF value of the Ti – 50 at.% Ni during thermal cycling. Thermal cycling in the temperature range of the complete martensitic transformation causes the thermokinetic EMF value reduction by 0.16 mV by the 15th temperature cycle. The degradation of the thermokinetic EMF value by 0.04 mV took place during thermal cycling in the temperature range of the incomplete martensitic transformation by the 70th thermal cycle. The thermokinetic EMF value was restored to 0.22 mV with increasing temperature to 240 °С, as in the case of annealing at temperatures of 400÷800 °С. The thermokinetic EMF value is associated with a change in physical and mechanical properties of the alloy during thermal cycling. It is characterized by a change in stages of the phase transition and a shift of the characteristic temperatures. On the basis of the obtained experimental data, a method was proposed for a purposeful setting of extended TiNi wire sections with the thermokinetic EMF value from 0 to 0.6 mV, using different methods of influence on its value (thermal cycling, deformation, temperature change in heating zone). The proposed technical solution can be used as a method for information recording.

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