zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2024-90-12-65-71zldm-2363Research ArticleИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. МЕХАНИКА МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬTESTING OF STRUCTURE AND PARAMETERS. MECHANICAL TESTING METHODSЭлектропластический эффект в титане при сжатииElectroplastic effect in titanium during compressionКорольковО. Е.KorolkovO. E.

Олег Евгеньевич Корольков, 

101000, Москва, Малый Харитоньевский пер., д. 4.

Oleg E. Korolkov,   

4, Maly Kharitonievsky per., Moscow, 101990.

korolkov_oleg@vk.comМисоченкоА. А.MisochenkoA. A.

Анна Александровна Мисоченко, 

101000, Москва, Малый Харитоньевский пер., д. 4.

Anna A. Misochenko,

4, Maly Kharitonievsky per., Moscow, 101990.

СтоляровВ. В.StolyarovV. V.

Владимир Владимирович Столяров,

101000, Москва, Малый Харитоньевский пер., д. 4.

Vladimir V. Stolyarov,

4, Maly Kharitonievsky per., Moscow, 101990.

Институт машиноведения им. А. А. Благонравова Российской академии наукРоссияMechanical Engineering Research Institute of the Russian Academy of SciencesRussian Federation20242312202490126571Copyright © Корольков О.Е., Мисоченко А.А., Столяров В.В., 20242024Корольков О.Е., Мисоченко А.А., Столяров В.В.Korolkov O.E., Misochenko A.A., Stolyarov 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://www.zldm.ru/jour/article/view/2363

Как известно, электропластический эффект (ЭПЭ) проявляется в снижении напряжений течения и/или повышении пластичности при деформации металла и одновременном пропускании через него электрического тока. Интерес представляет исследование данного эффекта во многих металлах, в том числе в чистом титане, обладающем биосовместимостью с органической средой и коррозионной стойкостью, благодаря чему он активно используется в медицине, авиатехнике и других отраслях. Традиционно эффект исследуют при растяжении, а в некоторых случаях и при других схемах деформации. Цель данной работы — исследование особенностей деформационного поведения крупнозернистого титана Grade 4 при сжатии и воздействии на него импульсного тока. При использовании тока высокой скважности (Q = 5000) на деформационной кривой сжатия наблюдаются скачки снижения напряжения. Если использовать ток низкой скважности (Q = 10) в процессе сжатия, интенсивность деформационного упрочнения, предел текучести, напряжения течения становятся меньше, чем при сжатии без воздействия тока. Выполнены измерения микротвердости, которая закономерно повышается при сжатии по сравнению с исходным состоянием, при этом ее повышение менее интенсивно при использовании тока высокой скважности. Исследованы структурные особенности титана после сжатия с током и без тока — интенсивность деформационных процессов при использовании тока снижается. При сжатии наблюдается измельчение частиц вторых фаз, при этом действие тока приводит к их частичному растворению. Проведено сравнение ЭПЭ при сжатии и растяжении. Отмечено их качественное сходство, но в большей степени этот эффект проявляется при сжатии. Полученные результаты могут быть использованы для разработки технологических процессов электропластической деформации титана.

As is known, the electroplastic effect (EPE) manifests itself in a decrease in flow stresses and/or an increase in plasticity during metal deformation and simultaneous passage of electric current through it. Of interest is the study of this effect in many metals, including pure titanium, which is biocompatible with an organic environment and corrosion resistant, due to which it is widely used in medicine, aviation engineering and other industries. Traditionally, the effect is studied under tension, and in some cases under other deformation schemes. The objective of this work is to study the features of the deformation behavior of coarse-grained Grade 4 titanium under compression and exposure to pulsed current. When using a high-duty ratio current (Q = 5000), jumps in stress reduction are observed on the compression deformation curve. If a low-duty ratio current (Q = 10) is used in the compression process, the intensity of strain hardening, yield strength, and flow stresses become less than under compression without the effect of current. The microhardness measurements were performed which naturally increases under compression compared to the initial state, while its increase is less intense when using a high-duty current. The structural features of titanium after compression with and without current were studied — the intensity of deformation processes when using current decreases. Under compression refinement of second-phase particles is observed while the effect of current leads to their partial dissolution. A comparison of electroplastic effects under compression and tension has been carried out. Qualitative similarity was noted, but EPE is more pronounced under compression. The results obtained can be used to develop technological processes for electroplastic deformation of titanium.

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