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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">10.26896/1028-6861-2022-88-10-54-65</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1774</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>Гигацикловая усталость зубчатого колеса турбокомпрессора</article-title><trans-title-group xml:lang="en"><trans-title>Gigacycle fatigue of the turbocharger gear wheel</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>Ботвина</surname><given-names>Л. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Botvina</surname><given-names>L. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Людмила Рафаиловна Ботвина</p><p>Институт металлургии и материаловедения им. А. А. Байкова</p><p>119334</p><p>Ле­нинский проспект, д. 49</p><p>Москва</p></bio><bio xml:lang="en"><p>Ludmila R. Botvina</p><p>A. A. Baikov Institute of Metallurgy and Materials Science</p><p>119334</p><p>49, Leninskii prosp.</p><p>Moscow</p></bio><email xlink:type="simple">lbotvina@imet.ac.ru</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>Тютин</surname><given-names>М. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Tyutin</surname><given-names>M. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марат Равилевич Тютин</p><p>Институт металлургии и материаловедения им. А. А. Байкова</p><p>119334</p><p>Ле­нинский проспект, д. 49</p><p>Москва</p></bio><bio xml:lang="en"><p>Marat R. Tyutin</p><p>A. A. Baikov Institute of Metallurgy and Materials Science</p><p>119334</p><p>49, Leninskii prosp.</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>Александров</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Alexandrov</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>125080</p><p>Волоколамское шоссе, д. 1, строение 1</p><p>Москва</p></bio><bio xml:lang="en"><p>Anatoly R Alexandrov</p><p>125080</p><p>1, str. 1, Volokolamskoe Shosse</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российская академия наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ООО «Газсерф»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>GasSurf Engineering Company</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>24</day><month>10</month><year>2022</year></pub-date><volume>88</volume><issue>10</issue><fpage>54</fpage><lpage>65</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ботвина Л.Р., Тютин М.Р., Александров А.П., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ботвина Л.Р., Тютин М.Р., Александров А.П.</copyright-holder><copyright-holder xml:lang="en">Botvina L.R., Tyutin M.R., Alexandrov A.R.</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/1774">https://www.zldm.ru/jour/article/view/1774</self-uri><abstract><p>   Цель работы — выявление причин преждевременного разрушения зубьев колеса турбо­компрессора Cameron ТА9000 мощностью 1820 кВт после эксплуатационного нагружения до 1,3 • 109 циклов.</p><p>   Выполнен анализ химического состава металла зубьев и методами ме­таллографии, микротвердости и оптической микроскопии исследована его микроструктура. Изучен микрорельеф поверхностей разрушения эксплуатационных изломов с помощью электронной сканирующей микроскопии. Химический анализ состава показал, что марка стали зубьев — DIN 31CrMoV9 — соответствует сведениям производителя. Визуаль­ный анализ представленных фрагментов выявил многочисленные трещины на поверхно­стях контакта зубьев. Обнаруженные на изломе очаги усталостного разрушения являются типичными для многоциклового, а также гигациклового усталостного разрушения. В последнем случае обнаруженный очаг имеет вид «рыбьего глаза», в центре которого располо­жена область структурной неоднородности с включениями и порами. Разрушение, вероят­но, развивалось от первого фрагмента зуба к пятому и сопровождалось увеличением числа очагов усталостного разрушения, которое, как известно, связано с повышением амплитуды напряжения. Металлографическое исследование показало наличие приповерхностного упрочнённого слоя толщиной 120 - 200 мкм с дефектной структурой, связанной с выделениями по границам зерен (предположительно карбидов (Fe, Сг)3С), что могло быть следст­вием нарушения режимов термической обработки шестерни. В приповерхностном упроч­ненном слое происходило образование хрупких межзеренных трещин по поверхности кон­такта, развитие которых на всю глубину слоя стало причиной уменьшения прочности и несущей способности зубьев шестерни. Взаимодействие возникших трещин с продольными микротрещинами, зародившимися на дефектах некачественной механической обработки шестерни, привело к формированию очагов усталостных трещин, развитие которых вы­звало окончательное разрушение нескольких зубьев.</p></abstract><trans-abstract xml:lang="en"><p>   The goal of the study is to elucidate the reasons for early fracture of the gear wheel teeth of a Cameron TA9000 turbocharger (1820 kW) after an operational load up to 1. 3 x 109 cycles.</p><p>   The chemical composi­tion and the microstracture of the tooth metal were studied using the methods of metallography, microhardness and optical microscopy. The microrelief of fracture surfaces of operational fractures was studied using electron scanning microscopy. Analysis of chemical composition proved the steel grade of the tooth metal (DIN 31CrMoV9) declared by the manufacturer. Visual analysis of the fragments under study re­vealed numerous cracks present on the tooth contact surfaces. The fatigue fracture origins detected on the fracture surfaces are typical of high cycle and gigacycle fatigue fracture. In the latter case, the detected fracture looks like a "fish eye" exhibiting an area of?? structural heterogeneity with inclusions and pores in the center. The fracture probably developed from the first tooth fragment to the fifth one being accom­ panied by an increase in the number of fatigue fracture origins known to be attributed to an increase in the stress amplitude. Metallographic study showed the presence of a subsurface hardened layer with a thickness of 120 - 200 pm with a defect-containing structure associated with grain-boundary precipitates (presumably, carbides (Fe, Cr)3C), which can result from violation of the modes of heat treatment of the gear wheel. Formation of brittle intergranular cracks on the contact surface and their subsequent develop­ment in the entire depth of the subsurface hardened layer appeared to be the reason for a decrease in the strength and bearing capacity of the gear teeth.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эксплуатационное разрушение</kwd><kwd>зубчатое колесо</kwd><kwd>турбокомпрессор</kwd><kwd>шестерня</kwd><kwd>фрактография</kwd><kwd>гигацикловая усталость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>operational failure</kwd><kwd>gear wheel</kwd><kwd>turbocharger</kwd><kwd>pinion</kwd><kwd>ffactography</kwd><kwd>gigacycle fatigue</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках Государственного задания № 075-00715-22-00</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the State order No. 075-00715-22-00</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">Бондаренко С. 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