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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Obrabotka Metallov / Metal Working and Material Science</journal-id><journal-title-group><journal-title xml:lang="en">Obrabotka Metallov / Metal Working and Material Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Обработка металлов (технология • оборудование • инструменты)</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1994-6309</issn><issn publication-format="electronic">2541-819X</issn><publisher><publisher-name xml:lang="en">Новосибирский государственный технический университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">424441</article-id><article-id pub-id-type="doi">10.17212/1994-6309-2026-28.2-243-263</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>MATERIAL SCIENCE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Study of the microstructure and properties of high-entropy alloy AlFeCoCrNiNbх fabricated by mechanical alloying and spark plasma sintering</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование микроструктуры и свойств высокоэнтропийного сплава AlFeCoCrNiNbх, полученного методом механического легирования и искрового плазменного спекания</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-8501-2643</contrib-id><contrib-id contrib-id-type="researcherid">A-4999-2014</contrib-id><name-alternatives><name xml:lang="ru"><surname>Лю</surname><given-names>Юаньсюнь</given-names></name><name xml:lang="en"><surname>liu</surname><given-names>Yuanxun</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D. student</p></bio><bio xml:lang="ru"><p>Аспирант</p></bio><email>yuansyun1@tpu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3040-8851</contrib-id><contrib-id contrib-id-type="scopus">56433301500</contrib-id><contrib-id contrib-id-type="researcherid">A-4999-2014</contrib-id><contrib-id contrib-id-type="spin">2942-3092</contrib-id><name-alternatives><name xml:lang="en"><surname>Kovalevskaya</surname><given-names>Zhanna G.</given-names></name><name xml:lang="ru"><surname>Ковалевская</surname><given-names>Жанна Геннадьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D.Sc. (Engineering), Associate Professor</p></bio><bio xml:lang="ru"><p>доктор техн. наук, доцент</p></bio><email>kovalevskaya@tpu.ru</email></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1070-7678</contrib-id><contrib-id contrib-id-type="spin">9857-1647</contrib-id><name-alternatives><name xml:lang="en"><surname>Huang</surname><given-names>Jingrui</given-names></name><name xml:lang="ru"><surname>Хуан</surname><given-names>Цзинжуй</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>инженер</p></bio><bio xml:lang="en"><p>Engineer</p></bio><email>jereehuang@gmail.com</email></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5859-7418</contrib-id><contrib-id contrib-id-type="scopus">56433266500</contrib-id><contrib-id contrib-id-type="researcherid">O-2420-2017</contrib-id><contrib-id contrib-id-type="spin">2785-2322</contrib-id><name-alternatives><name xml:lang="ru"><surname>Химич</surname><given-names>Маргарита Андреевна</given-names></name><name xml:lang="en"><surname>Khimich</surname><given-names>Margarita A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>канд. техн. наук</p></bio><bio xml:lang="en"><p>Ph.D. (Engineering)</p></bio><email>khimich@ispms.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Research Tomsk Polytechnic University</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Томский политехнический университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Strength Physics and Materials Sciences SB RAS</institution></aff><aff><institution xml:lang="ru">Институт физики прочности и материаловедения СО РАН</institution></aff></aff-alternatives><content-language>ru</content-language><content-language>en</content-language><volume>28</volume><issue>2</issue><issue-title xml:lang="ru">ТОМ 28, №2 (2026)</issue-title><issue-title xml:lang="en">VOL 28, NO2 (2026)</issue-title><fpage>243</fpage><lpage>263</lpage><history><date date-type="received" iso-8601-date="2026-06-02"><day>02</day><month>06</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, liu Y., Kovalevskaya Z.G., Huang J., Khimich M.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Лю Ю., Ковалевская Ж.Г., Хуан Ц., Химич М.А.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">liu Y., Kovalevskaya Z.G., Huang J., Khimich M.A.</copyright-holder><copyright-holder xml:lang="ru">Лю Ю., Ковалевская Ж.Г., Хуан Ц., Химич М.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rcsi.science/1994-6309/article/view/424441">https://journals.rcsi.science/1994-6309/article/view/424441</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Mechanical alloying (MA) combined with spark plasma sintering (SPS) is widely used for the fabrication of high-entropy alloys (HEAs). The combination of MA and SPS effectively suppresses grain growth, largely preserving the structure obtained after mechanical activation. This enables the production of HEAs with unique properties. In this study, HEAs of the AlFeCoCrNiNbx system (where x is the molar fraction, x = 0, 0.25, 0.5, and 0.75) were fabricated by MA for 40 hours followed by SPS at 1,000 °C. <bold>The purpose of this work</bold> is to investigate the effect of Nb content on the microstructure and properties of the AlFeCoCrNiNbx high entropy alloy obtained via the combined MA and SPS method. <bold>Methods. </bold>Both initial powders and sintered samples were studied by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM). Microhardness and compressive properties were evaluated, and the resulting fracture surfaces were analyzed. <bold>Results and Discussion.</bold> During MA, a solid solution with a BCC lattice and a nanoscale substructure was formed in the powder of all AlFeCoCrNiNbx alloys. Alloying with a significant fraction of niobium led to the formation of a small amount of the strengthening Laves phase. Subsequent SPS promoted a phase transformation, resulting in approximately equal volume fractions of a BCC solid solution enriched in Al and Ni and an FCC solid solution enriched in Fe and Cr. Heating facilitated the precipitation of the Laves phase as secondary grains within the BCC solid solution grains. Increasing the Nb content in the alloy led to an increase in the fraction of the Laves phase. Evaluation of the mechanical properties showed that the highest plasticity is characteristic of the AlFeCoCrNi alloy; the highest strength, of the AlFeCoCrNiNb0.25 alloy; the highest hardness, of the AlFeCoCrNiNb0.75 alloy, which is attributed to the specific microstructural features and the fraction of the Laves phase in the alloy.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Для создания высокоэнтропийных сплавов (ВЭС) часто применяют механическое легирование (МА) в сочетании с искровым плазменным спеканием (SPS). Комбинация процесса МA с SPS позволяет эффективно подавлять рост зерен, максимально сохраняя исходную структуру, полученную после механической активации. Это дает возможность получать ВЭС с уникальными свойствами. В настоящем исследовании методом МA в течение 40 часов с последующим SPS при температуре 1000 °C получены ВЭС-системы AlFeCoCrNiNbx (где x – молярная доля, x = 0; 0,25; 0,5; 0,75).<bold> Целью работы </bold>является исследование влияния содержания Nb на микроструктуру и свойства высокоэнтропийного сплава AlFeCoCrNiNbх, полученного с помощью комбинированного метода МА и SPS. <bold>Методы исследований.</bold> Как для порошков, так и для спеченных образцов проводились рентгеноструктурный анализ (РСА), энергодисперсионная рентгеновская спектрометрия (ЭДС) и сканирующая электронная микроскопия (СЭМ). Оценивались микротвердость и механические свойства на сжатие с анализом изломов. <bold>Результаты и обсуждение. </bold>В процессе МА в порошке всех сплавов системы AlFeCoCrNiNbх был получен общий твердый раствор с ОЦК-решеткой и наноразмерной субструктурой. Легирование сплава значительной долей ниобия привело к образованию небольшого количества упрочняющей фазы Лавеса. Последующее SPS способствовало фазовому превращению с формированием примерно в равных объемных долях ОЦК-твердого раствора, обогащенного Al и Ni, и ГЦК-твердого раствора, обогащенного Fe и Cr. Нагрев способствовал выделению фазы Лавеса в виде вторичных зерен внутри зерен ОЦК-твердого раствора. С возрастанием в сплаве доли Nb увеличивалась доля фазы Лавеса. Оценка механических свойств показала, что самая высокая пластичность характерна для сплава AlFeCoCrNi, прочность – для сплава AlFeCoCrNiNb0,25, твердость – для сплава AlFeCoCrNiNb0,75, что обусловлено особенностями строения и долей фазы Лавеса в составе сплава.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Высокоэнтропийный сплав</kwd><kwd>AlFeCoCrNiNbх</kwd><kwd>Механическое легирование</kwd><kwd>Искровое плазменное спекание</kwd><kwd>Микроструктура</kwd><kwd>Микротвердость</kwd><kwd>Испытания на сжатие</kwd></kwd-group><kwd-group xml:lang="en"><kwd>High-Entropy Alloy</kwd><kwd>AlFeCoCrNiNbx</kwd><kwd>Mechanical alloying</kwd><kwd>Spark plasma sintering</kwd><kwd>Microstructure</kwd><kwd>Microhardness</kwd><kwd>Compression Tests</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation, Project No. 25-49-00169, https://rscf.ru/project/25-49-00169/.</funding-statement><funding-statement xml:lang="ru">Исследование выполнено с участием средств гранта Российского научного фонда, проект № 25-49-00169, https://rscf.ru/project/25-49-00169/.</funding-statement></funding-group></article-meta><fn-group><fn xml:lang="ru"><p><italic>Финансирование</italic></p> <p>Исследование выполнено с участием средств гранта Российского научного фонда, проект № 25-49-00169, https://rscf.ru/project/25-49-00169/. </p></fn><fn xml:lang="en"><p><italic>Funding</italic></p> <p>The study was supported by the Russian Science Foundation, Project No. 25-49-00169, https://rscf.ru/project/25-49-00169/.</p></fn></fn-group></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Nanostructured high?entropy alloys with multiple principal elements: novel alloy design concepts and outcomes / J.W. 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