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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">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2023-3-367-375</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2562</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>ИННОВАЦИИ В МЕТАЛЛУРГИЧЕСКОМ ПРОМЫШЛЕННОМ И ЛАБОРАТОРНОМ ОБОРУДОВАНИИ, ТЕХНОЛОГИЯХ И МАТЕРИАЛАХ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INNOVATIONS IN METALLURGICAL INDUSTRIAL AND LABORATORY EQUIPMENT, TECHNOLOGIES AND MATERIALS</subject></subj-group></article-categories><title-group><article-title>Метод изучения частотной стабильности материалов при испытаниях на многоцикловую усталость стали</article-title><trans-title-group xml:lang="en"><trans-title>A method for studying the frequency stability of materials during tests for multi-cycle fatigue of steel</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5545-4163</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мыльников</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Myl’nikov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Викторович Мыльников, к.т.н., доцент кафедры «Технологии строительства»</p><p>Россия, 603950, Нижний Новгород, ул. Ильинская, 65</p></bio><bio xml:lang="en"><p>Vladimir V. Myl’nikov, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Building Technology”</p><p>65 Il’inskaya Str., Nizhny Novgorod 603950, Russian Federation</p></bio><email xlink:type="simple">mrmylnikov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8023-316X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дмитриев</surname><given-names>Э. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Dmitriev</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Эдуард Анатольевич Дмитриев, д.т.н., доцент, ректор</p><p>Россия, 681013, Хабаровский край, Комсомольск-на-Амуре, пр. Ленина, 27</p></bio><bio xml:lang="en"><p>Eduard A. Dmitriev, Dr. Sci. (Eng.), Assist. Prof., Rector</p><p>27 Lenina Ave., Komsomolsk-on-Amur, Khabarovsk Territory 681013, Russian Federation</p></bio><email xlink:type="simple">rector@knastu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Нижегородский государственный архитектурно-строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Nizhny Novgorod State University of Architecture, Building and Civil Engineering</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Комсомольский-на-Амуре государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Komsomolsk-on-Amur State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>03</day><month>07</month><year>2023</year></pub-date><volume>66</volume><issue>3</issue><fpage>367</fpage><lpage>375</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мыльников В.В., Дмитриев Э.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Мыльников В.В., Дмитриев Э.А.</copyright-holder><copyright-holder xml:lang="en">Myl’nikov V.V., Dmitriev E.A.</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://fermet.misis.ru/jour/article/view/2562">https://fermet.misis.ru/jour/article/view/2562</self-uri><abstract><p>Для безаварийного функционирования и без потерь упругих и неупругих свойств особо ответственных элементов преобразователей электрических колебаний в механические в течение длительного периода циклической наработки необходимо, кроме исследования усталостных характеристик материалов, применяемых для их изготовления, исследовать эти сплавы и на частотную стабильность. Это связано с тем, что незначительные отклонения частоты собственных колебаний приводят к недопустимым погрешностям в работе такого рода высокоточных изделий. Для проведения  исследований разработана и сконструирована оригинальная установка, работающая в режиме автоколебаний, в которой осуществлено синусоидальное нагружение плоских образцов по «мягкой» схеме консольного изгиба. Частота циклического нагружения в установке генерируется импульсами тока, которые являются откликом на частоту собственных колебаний испытываемого образца, преобразованных с помощью электроники. В результате достигается частотное равенство в процессе испытаний. Разработан алгоритм расчета напряжений в зависимости от амплитуды нагружения образцов из стали разной геометрической формы. Показано, что напряжение на образце, рассчитанное по амплитуде деформации, во всех случаях на 8 – 10 % выше напряжения, рассчитанного по силе вне зависимости от формы образцов. Для верификации предложенного метода исследований проведены испытания мартенситно-стареющей стали на нагрузках, близких к пределу усталости, так как наибольший интерес представляет стабильность частоты в этом диапазоне. Получены частотные характеристики в многоцикловой области испытаний. Определено, что при наработке в 50 млн циклов нагружения изменение частоты составило 0,75 Гц. Выявлена динамика частотной стабильности: наиболее интенсивно частота менялась при первых 10 млн циклов нагружения, за это время она изменилась на 0,54 Гц.</p></abstract><trans-abstract xml:lang="en"><p>For trouble-free operation without loss of elastic and inelastic properties of particularly critical elements of electrical-to-mechanical vibration converters during a long period of cyclic operation, it is necessary, in addition to studying the fatigue characteristics of materials used for their manufacture, to study these alloys for frequency stability, since minor deviations in the frequency of natural oscillations lead to unacceptable errors in the operation of such high-precision products. To carry out such studies, we developed and constructed an original installation, in which sinusoidal loading is carried out according to the “soft” scheme of flat samples cantilever bending operating in self-oscillation mode. The frequency of cyclic loading in this installation is generated by current pulses, which are a response to the frequency of the test sample natural oscillations converted using electronics.  As a result, frequency equality is achieved in the test process. An algorithm for calculating stresses depending on the loading amplitude of steel samples of different geometric shapes was developed. It is shown that the stress on the sample calculated by the deformation amplitude in all cases is 8 – 10 % higher than the stress calculated by the force, regardless of the shape of the proposed samples. To verify the proposed research method, martensitic-aging steel was tested at loads close to the fatigue limit, since frequency stability in this range is of great interest. We obtained the frequency characteristics in the multi-cycle test area. It was determined that with an operating time of 50 million loading cycles, the frequency change was 0.75 Hz. The dynamics of frequency stability was revealed: the frequency changed most intensively during the first 10 million loading cycles, during this time the frequency changed by 0.54 Hz.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сталь</kwd><kwd>усталость</kwd><kwd>амплитуда деформации</kwd><kwd>частота нагружения</kwd><kwd>долговечность</kwd><kwd>частота собственных колебаний</kwd><kwd>циклическая прочность</kwd><kwd>стабильность частоты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>steel</kwd><kwd>fatigue</kwd><kwd>strain amplitude</kwd><kwd>loading frequency</kwd><kwd>durability</kwd><kwd>natural oscillation frequency</kwd><kwd>cyclic strength</kwd><kwd>frequency stability</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Школьник Л.М. Методика усталостных испытаний: Справочник. Москва: Металлургия; 1978:304.</mixed-citation><mixed-citation xml:lang="en">Shkol’nik L.M. Fatigue Testing Methodology. Guide. Moscow: Metallurgiya; 1978:304. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Gadolina I.V., Makhutov N.A., Erpalov A.V. Varied app­roaches to loading assessment in fatigue studies. International Journal of Fatigue. 2021;144:106035. https://doi.org/10.1016/j.ijfatigue.2020.106035</mixed-citation><mixed-citation xml:lang="en">Gadolina I.V., Makhutov N.A., Erpalov A.V. Varied app­roaches to loading assessment in fatigue studies. International Journal of Fatigue. 2021;144:106035. https://doi.org/10.1016/j.ijfatigue.2020.106035</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Suresh S. Fatigue of Metals. Cambridge University Press; 2006:701.</mixed-citation><mixed-citation xml:lang="en">Suresh S. Fatigue of Metals. Cambridge University Press; 2006:701.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Терентьев В.Ф., Кораблева С.А. Усталость металлов. Mосква: Наука; 2015:479.</mixed-citation><mixed-citation xml:lang="en">Terent’ev V.F., Korableva S.A. Fatigue of Metals. Moscow: Nauka; 2015:479. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Gromov V.E., Ivanov Yu.F., Vorobiev S.V., Konovalov S.V. Fatigue of Steels Modified by High Intensity Electron Beams. Cambridge; 2015:272.</mixed-citation><mixed-citation xml:lang="en">Gromov V.E., Ivanov Yu.F., Vorobiev S.V., Konovalov S.V. Fatigue of Steels Modified by High Intensity Electron Beams. Cambridge; 2015:272.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Mughrabi H., Christ H.-J. Cyclic deformation and fatigue of selected ferritic and austenitic steels; specific aspects. ISIJ International. 1997;37(12):1154–1169. https://doi.org/10.2355/isijinternational.37.1154</mixed-citation><mixed-citation xml:lang="en">Mughrabi H., Christ H.-J. Cyclic deformation and fatigue of selected ferritic and austenitic steels; specific aspects. ISIJ International. 1997;37(12):1154–1169. https://doi.org/10.2355/isijinternational.37.1154</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Gadenin M.M. Study on damaging and fatigue life of const­ructions under single- and two-frequency loading modes based on deformational and energy approaches. Inorganic Materials. 2018;54(15):1543–1550. https://doi.org/10.1134/S0020168518150049</mixed-citation><mixed-citation xml:lang="en">Gadenin M.M. Study on damaging and fatigue life of const­ructions under single- and two-frequency loading modes based on deformational and energy approaches. Inorganic Materials. 2018;54(15):1543–1550. https://doi.org/10.1134/S0020168518150049</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Гаденин М.М. Влияние формы цикла нагружения на сопротивление циклическому деформированию и разрушению конструкционных материалов. Вестник научно-технического развития. 2010;(9(37)):15–19.</mixed-citation><mixed-citation xml:lang="en">Gadenin M.M. Influence of loading cycle form on resistance to cyclic deformation and destruction of structural mate­rials. Vestnik nauchno-tekhnicheskogo razvitiya. 2010;(9(37)): 15–19. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Мыльников В.В., Шетулов Д.И., Кондрашкин О.Б., Чернышов Е.А., Пронин А.И. Изменение показателей сопротивления усталости конструкционных сталей при различных спектрах нагружения. Известия вузов. Черная Металлургия. 2019;62(10):796–802. https://doi.org/10.17073/0368-0797-2019-10-796-802</mixed-citation><mixed-citation xml:lang="en">Myl’nikov V.V., Shetulov D.I., Kondrashkin O.B., Chernyshov E.A., Pronin A.I. Changes in fatigue resistance of structural steels at different loading spectra. Izvestiya. Ferrous Metallurgy. 2019;62(10):796-802. (In Russ.). https://doi.org/10.17073/0368-0797-2019-10-796-802</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Гаденин М.М. Расчетно-экспериментальная оценка роли соотношения частот в измерении долговечности при двухчастотных режимах деформирования. Заводская лаборатория. Диагностика материалов. 2019;85(1–1):64–71. https://doi.org/10.26896/1028-6861-2019-85-1-I-64-71</mixed-citation><mixed-citation xml:lang="en">Gadenin M.M. Calculation-and-experimental estimation of the role of the frequency ratio in changing the endurance at two-frequency deformation modes. Zavodskaya laboratoriya. Diagnostika materialov. 2019;85(1-1):64–71. (In Russ.). https://doi.org/10.26896/1028-6861-2019-85-1-I-64-71</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Troshchenko V.T., Khamaza L.A., Pokrovsky V.V., etc. Cyclic Deformation and Fatigue of Metals. Bily M. ed. Amsterdam: Elsevier; 1993:500.</mixed-citation><mixed-citation xml:lang="en">Troshchenko V.T., Khamaza L.A., Pokrovsky V.V., etc. Cyclic Deformation and Fatigue of Metals. Bily M. ed. Amsterdam: Elsevier; 1993:500.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Головин С.А., Тихонова И.В. Температурная зависимость внутреннего трения и свойства деформированных малоуглеродистых сплавов железа. Деформация и разрушение материалов. 2013;(7):16–21.</mixed-citation><mixed-citation xml:lang="en">Golovin S.A., Tikhonova I.V. Temperature dependence of internal friction and properties of deformed low-carbon iron alloys. Deformatsiya i razrushenie materialov. 2013;(7): 16–21. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Головин С.А., Петрушина А.Г. Температурный спектр внутреннего трения чугунов. Известия вузов. Черная металлургия. 2009;52(9):51–54.</mixed-citation><mixed-citation xml:lang="en">Golovin S.A., Petrushina A.G. Temperature spectrum of internal friction of cast iron. Izvestiya. Ferrous Metallurgy. 2009;52(9):51–54. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">McClaflin D., Fatemi A. Torsional deformation and fatigue of hardened steel including mean stress and stress gradient effects. International Journal of Fatigue. 2004;26(7):773–784. https://doi.org/10.1016/j.ijfatigue.2003.10.019</mixed-citation><mixed-citation xml:lang="en">McClaflin D., Fatemi A. Torsional deformation and fatigue of hardened steel including mean stress and stress gradient effects. International Journal of Fatigue. 2004;26(7):773–784. https://doi.org/10.1016/j.ijfatigue.2003.10.019</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Головин И.С., Бычков А.С., Михайловская А.В., Добаткин С.В. Вклад фазовых и структурных превращений в многокомпонентных AL-MG сплавах в линейные и нелинейные механизмы неупругости. Физика металлов и металловедение. 2014;115(2):204. https://doi.org/10.7868/ S0015323014020089</mixed-citation><mixed-citation xml:lang="en">Golovin I.S., Bychkov A.S., Mikhailovskaya A.V., Dobatkin S.V. Contributions of phase and structural transformations in multicomponent Al-Mg alloys to the linear and nonlinear mechanisms of anelasticity. The Physics of Metals and Metallography. 2014;115(2):192–201. https://doi.org/10.1134/S0031918X14020082</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Kardashev B.K., Sapozhnikov K.V., Betekhtin V.I., Kadom­tsev A.G., Narykova M.V. Internal friction, Young’s modulus, and electrical resistivity of submicrocrystalline titanium. Physics of the Solid State. 2017;59(12):2381–2386. https://doi.org/10.1134/S1063783417120204</mixed-citation><mixed-citation xml:lang="en">Kardashev B.K., Sapozhnikov K.V., Betekhtin V.I., Kadom­tsev A.G., Narykova M.V. Internal friction, Young’s modulus, and electrical resistivity of submicrocrystalline titanium. Physics of the Solid State. 2017;59(12):2381–2386. https://doi.org/10.1134/S1063783417120204</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Blanter M.S., Golovin I.S., Neuhäuser H., Sinning H.R. Internal friction in metallic materials. Springer Series in Materials Science. 2007;90:1–535. https://doi.org/10.1007/978-3-540-68758-0</mixed-citation><mixed-citation xml:lang="en">Blanter M.S., Golovin I.S., Neuhäuser H., Sinning H.R. Internal friction in metallic materials. Springer Series in Materials Science. 2007;90:1–535. https://doi.org/10.1007/978-3-540-68758-0</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Столяров В.В. Неупругость ультрамелкозернистых металлов. Известия вузов. Черная металлургия. 2010;53(11): 51–54.</mixed-citation><mixed-citation xml:lang="en">Stolyarov V.V. Inelasticity of ultrafine-grained metals. Izvestiya. Ferrous Metallurgy. 2010;53(11):51–54. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Romaniv O.N., Laz’ko L.P., Krys’kiv A.S. Relationship of internal friction to the fatigue life of patented steel wire. Soviet Mater Science. 1984;19:522–527. https://doi.org/10.1007/BF00722120</mixed-citation><mixed-citation xml:lang="en">Romaniv O.N., Laz’ko L.P., Krys’kiv A.S. Relationship of internal friction to the fatigue life of patented steel wire. Soviet Mater Science. 1984;19:522–527. https://doi.org/10.1007/BF00722120</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Пат. 2781466 RU. Установка для испытаний на усталость / Мыльников В.В., Шетулов Д.И.; заявл. 14.09.2021; опубл. 12.10.2022. Бюл. № 29.</mixed-citation><mixed-citation xml:lang="en">Myl’nikov V.V., Shetulov D.I. Installation for fatigue testing. Patent RF no. 2781466. Bulleten’ izobretenii. 2022;(29). (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Демидов А.С., Кашелкин В.В. Определение поврежденности и напряженного состояния балочных образцов по изменению собственной частоты и амплитуды колебаний. Вестник Московского авиационного института. 2009;16(3):62–64.</mixed-citation><mixed-citation xml:lang="en">Demidov A.S., Kashelkin V.V. Determination of damage and stress state of beam samples by changing the natural frequency and amplitude of vibrations. Vestnik Moskovskogo aviatsionnogo instituta. 2009;16(3):62–64. (In Russ.).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
