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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2022-88-10-73-82</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1776</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕХАНИКА МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MECHANICAL TESTING METHODS</subject></subj-group></article-categories><title-group><article-title>Электропласти­ческий эффект в титановых сплавах при их растяжении</article-title><trans-title-group xml:lang="en"><trans-title>The electroplastic effect in titanium alloys under tension</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корольков</surname><given-names>О. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Korolkov</surname><given-names>O. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Олег Евгеньевич Корольков</p><p>Институт машиноведения им. А. А. Благонравова</p><p>101000</p><p>Малый Харитоньевский пер., д. 4</p><p>Москва</p></bio><bio xml:lang="en"><p>Oleg E. Korolkov</p><p>A. A. Blagonravov Mechanical Engineering Research Institute</p><p>101990</p><p>4, Maly Kharitonievsky per.</p><p>Moscow</p></bio><email xlink:type="simple">korolkov_oleg@vk.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пахомов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pakhomov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Андреевич Пахомов</p><p>Институт машиноведения им. А. А. Благонравова</p><p>101000</p><p>Малый Харитоньевский пер., д. 4</p><p>Москва</p></bio><bio xml:lang="en"><p>Mikhail A. Pakhomov</p><p>A. A. Blagonravov Mechanical Engineering Research Institute</p><p>101990</p><p>4, Maly Kharitonievsky per.</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Столяров</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Stolyarov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Владимирович Столяров</p><p>Институт машиноведения им. А. А. Благонравова</p><p>101000</p><p>Малый Харитоньевский пер., д. 4</p><p>Москва</p></bio><bio xml:lang="en"><p>Vladimir V Stolyarov</p><p>A. A. Blagonravov Mechanical Engineering Research Institute</p><p>101990</p><p>4, Maly Kharitonievsky per.</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>25</day><month>10</month><year>2022</year></pub-date><volume>88</volume><issue>10</issue><fpage>73</fpage><lpage>82</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Корольков О.Е., Пахомов М.А., Столяров В.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Корольков О.Е., Пахомов М.А., Столяров В.В.</copyright-holder><copyright-holder xml:lang="en">Korolkov O.E., Pakhomov M.A., Stolyarov V.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.zldm.ru/jour/article/view/1776">https://www.zldm.ru/jour/article/view/1776</self-uri><abstract><p>   Электропластический эффект (ЭПЭ) — явление, при котором наблюдается снижение сопротивления металла деформации, а также улучшение его пластичности под влиянием электрического тока достаточно высокой плотности [<xref ref-type="bibr" rid="cit1">1</xref>].</p><p>   Цель работы — сравнение дефор­мационного поведения однофазного технически чистого титана Grade 4 и двухфазного ти­танового сплава ВТ6 при растяжении с введением импульсного тока и внешним нагревом.    Ток различной скважности и плотности подводили к захватам разрывной машины от им­пульсного генератора. Для оценки относительного вклада электропластического эффекта при пропускании  тока в снижение напряжений течения на материалы воздействовали также тепловым источником. Микроструктуру образцов в головке образца и вблизи области разрушения в продольном сечении исследовали методом оптической микроскопии. Элект­ропластический эффект в исследованных материалах проявлялся на кривой растяжения в виде отдельных скачков напряжения течения вниз при токе высокой скважности и в сни­жении напряжения течения и деформационного упрочнения, увеличении пластичности при импульсном токе низкой скважности. Установлено, что при растяжении образца с воз­действием тока происходит большее снижение напряжений течения, чем при внешнем на­греве, при одинаковой температуре в обоих материалах. Это подтверждает атермическую природу влияния импульсного тока. Критическая плотность импульсного тока высокой скважности (q = 5000), при которой проявляется электропластический эффект, для сплава ВТ6 в два раза ниже, чем для Grade 4. При одинаковых режимах импульсного тока напря­жения течения для ВТ6 снижаются больше, чем для Grade 4. Импульсный ток высокой скважности в сплаве ВТ6 вызывал аномальный эффект упрочнения, физическая природа которого нуждается в дополнительном исследовании. Использованные режимы импуль­сного тока не привели к заметным при оптическом увеличении структурным изменениям растягиваемых образцов, кроме исчезновения двойников и выделения частиц примесей в Grade 4, а также сфероидизации зерен в ВТ6.</p></abstract><trans-abstract xml:lang="en"><p>   The electroplastic effect (EPE) is a phenomenon which consists in a decrease in the strain resistance and enhancing of the plasticity of metals under the effect of the electric current of a sufficiently high density [<xref ref-type="bibr" rid="cit1">1</xref>].</p><p>   The goal of the study is to compare the deformation behavior of single-phase commercially pure tita­nium Grade 4 and two-phase VT6 alloy under tension and external heating with introduction of a pulsed current.</p><p>   Current of various pulse ratio and density was supplied to the grips of the tensile testing machine from a pulse generator. To estimate the relative contribution of the electroplastic effect during passage of current to the reduction of flow stresses, the materials were also exposed to external heating. The microstructure of the samples in the sample head and in the vicinity of the fracture region in the longitu­dinal section was studied using optical microscopy. The electroplastic effect in the studied materials is manifested on the tensile curve through individual jumps in the downward flow stress at a high pulse ra­tio, whereas at a low current pulse ratio a decrease in the flow stress and strain hardening and increase in the plasticity are observed. It is shown that tension of the sample under the effect of current results in a greater decrease in the flow stresses than that observed under external heating at the same temperature for both materials. This confirms the athermal nature of the pulsed current effect. The critical density of the high pulse ratio current (q - 5000) capable of providing manifestation of the electroplastic effect is two times lower for a VT6 alloy than for pure titanium Grade 4. Under the same pulsed current modes, the flow stresses for VT6 decrease more than for Grade 4. Pulsed current of high pulse ratio caused an anomalous hardening effect in a VT6 alloy, but the physical nature of this effect requires an additional study. The pulsed current modes used in the study did not lead to any structural changes noticeable under optical magnification in the samples under tension, except for the disappearance of twins and separation of the impurity particles in Grade 4 and spheroidization of grains in VT6.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>электропластический эффект</kwd><kwd>импульсный ток</kwd><kwd>растяжение</kwd><kwd>титан</kwd><kwd>микроструктура</kwd></kwd-group><kwd-group xml:lang="en"><kwd>electroplastic effect</kwd><kwd>pulsed current</kwd><kwd>tension</kwd><kwd>titanium</kwd><kwd>microstructure</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Министер­ства науки и высшего образования Российской Федерации в рамках проекта по соглашению № 075-15-2021-709, уникальный идентификатор проекта RF-2296. 61321X0037 (проведение кон­трольных измерений)</funding-statement><funding-statement xml:lang="en">The work was carried out with the support of the Ministry of Science and Higher Education of the Russian Federation Federation within the framework of the project under Agreement No. 075-15-2021-709, unique project identifier RF-2296. 61321X0037 (carrying out control measurements)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Троицкий О. 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