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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Frontier Materials &amp; Technologies</journal-id><journal-title-group><journal-title xml:lang="en">Frontier Materials &amp; Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Frontier Materials &amp; Technologies</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4039</issn><issn publication-format="electronic">2782-6074</issn><publisher><publisher-name xml:lang="en">Togliatti State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">967</article-id><article-id pub-id-type="doi">10.18323/2782-4039-2024-3-69-4</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">The influence of grain size on hydrogen embrittlement of a multicomponent (FeCrNiMnCo)99N1 alloy</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние размера зерна на закономерности водородного охрупчивания многокомпонентного сплава (FeCrNiMnCo)99N1</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gurtova</surname><given-names>Darya Yu.</given-names></name><name xml:lang="ru"><surname>Гуртова</surname><given-names>Дарья Юрьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>student</p></bio><bio xml:lang="ru"><p>студент</p></bio><email>dasha_gurtova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0236-2227</contrib-id><name-alternatives><name xml:lang="en"><surname>Panchenko</surname><given-names>Marina Yu.</given-names></name><name xml:lang="ru"><surname>Панченко</surname><given-names>Марина Юрьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>junior researcher of Laboratory of Physics of Hierarchic Structures in Metals and Alloys</p></bio><bio xml:lang="ru"><p>младший научный сотрудник лаборатории физики иерархических структур в металлах и сплавах</p></bio><email>panchenko.marina4@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8238-6055</contrib-id><name-alternatives><name xml:lang="en"><surname>Melnikov</surname><given-names>Evgeny V.</given-names></name><name xml:lang="ru"><surname>Мельников</surname><given-names>Евгений Васильевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>junior researcher of Laboratory of Physics of Hierarchic Structures in Metals and Alloys</p></bio><bio xml:lang="ru"><p>младший научный сотрудник лаборатории физики иерархических структур в металлах и сплавах</p></bio><email>melnickow.jenya@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1277-4180</contrib-id><name-alternatives><name xml:lang="en"><surname>Astapov</surname><given-names>Denis O.</given-names></name><name xml:lang="ru"><surname>Астапов</surname><given-names>Денис Олегович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>student</p></bio><bio xml:lang="ru"><p>студент</p></bio><email>denis.0612@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1995-4205</contrib-id><name-alternatives><name xml:lang="en"><surname>Astafurova</surname><given-names>Elena G.</given-names></name><name xml:lang="ru"><surname>Астафурова</surname><given-names>Елена Геннадьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences (Physics and Mathematics), Head of Laboratory of Physics of Hierarchic Structures in Metals and Alloys</p></bio><bio xml:lang="ru"><p>доктор физико-математических наук, заведующий лабораторией физики иерархических структур в металлах и сплавах</p></bio><email>elena.g.astafurova@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Tomsk State University</institution></aff><aff><institution xml:lang="ru">Томский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Strength Physics and Materials Science of Siberian Branch of RAS</institution></aff><aff><institution xml:lang="ru">Институт физики прочности и материаловедения Сибирского отделения РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2024</year></pub-date><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>41</fpage><lpage>51</lpage><history><date date-type="received" iso-8601-date="2024-10-16"><day>16</day><month>10</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-10-16"><day>16</day><month>10</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Gurtova D.Y., Panchenko M.Y., Melnikov E.V., Astapov D.O., Astafurova E.G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Гуртова Д.Ю., Панченко М.Ю., Мельников Е.В., Астапов Д.О., Астафурова Е.Г.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Gurtova D.Y., Panchenko M.Y., Melnikov E.V., Astapov D.O., Astafurova E.G.</copyright-holder><copyright-holder xml:lang="ru">Гуртова Д.Ю., Панченко М.Ю., Мельников Е.В., Астапов Д.О., Астафурова Е.Г.</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://vektornaukitech.ru/jour/article/view/967">https://vektornaukitech.ru/jour/article/view/967</self-uri><abstract xml:lang="en"><p>The problem of hydrogen embrittlement remains relevant in many areas, so the FeCrNiMnCo alloy (Cantor alloy) generates increased interest among researchers as one of the materials least exposed to the negative effect of hydrogen. Nevertheless, the issue of the influence of microstructure parameters on hydrogen embrittlement of the Cantor alloy and multicomponent alloys of the FeCrNiMnCo system in general remains understudied. This work studies the influence of grain size on the susceptibility of a nitrogen-doped high-entropy Cantor alloy to hydrogen embrittlement. For this purpose, states with different grain sizes (43±21, 120±57, and 221±97 μm) were formed in the (FeCrNiMnCo)<sub>99</sub>N<sub>1</sub> alloy, using thermomechanical treatments. It is experimentally found that grain refinement leads to an increase in the strength properties of the alloy under study and promotes an increase in the resistance to the hydrogen embrittlement: in samples with the smallest grain size, the hydrogen-induced decrease in ductility is less than in samples with the largest one. A decrease in grain size causes as well a decrease in the length of the brittle zone detected on the fracture surfaces of samples after tension. This is caused by a decrease in hydrogen diffusion during the hydrogen-charging process and a decrease in the transport of hydrogen atoms with mobile dislocations during plastic deformation due to a decrease in grain size.</p></abstract><trans-abstract xml:lang="ru"><p>Проблема водородного охрупчивания остается актуальной во многих сферах, поэтому повышенный интерес среди исследователей вызывает сплав FeCrNiMnCo (сплав Кантора) как один из наименее подверженных негативному воздействию водорода материалов. Тем не менее малоизученным остается вопрос о влиянии параметров микроструктуры на закономерности водородного охрупчивания сплава Кантора и многокомпонентных сплавов системы FeCrNiMnCo в целом. В работе изучено влияние размера зерна на склонность высокоэнтропийного сплава Кантора, легированного азотом, к водородной хрупкости. Для этого с помощью термомеханических обработок в сплаве (FeCrNiMnCo)<sub>99</sub>N<sub>1 </sub>были сформированы состояния с разным размером зерен (43±21, 120±57 и 221±97 мкм). Экспериментально установлено, что измельчение зерна приводит к увеличению прочностных свойств исследуемого сплава и способствует повышению устойчивости к эффектам водородной хрупкости: в образцах с наименьшим из представленных размером зерна водородно-индуцируемое снижение пластичности меньше, чем в образцах с наибольшим размером зерна. Уменьшение размера зерна вызывает также снижение длины хрупкой зоны, выявляемой на поверхностях разрушения образцов после растяжения. Это вызвано снижением диффузии водорода в процессе насыщения и уменьшением транспорта атомов водорода с подвижными дислокациями в процессе пластической деформации за счет уменьшения размера зерна. </p></trans-abstract><kwd-group xml:lang="en"><kwd>hydrogen embrittlement</kwd><kwd>multicomponent alloys</kwd><kwd>high-entropy alloys</kwd><kwd>Cantor alloy</kwd><kwd>(FeCrNiMnCo)99N1</kwd><kwd>hydrogen-induced brittle zone</kwd><kwd>grain boundaries</kwd><kwd>fracture</kwd><kwd>mechanical properties</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>водородное охрупчивание</kwd><kwd>многокомпонентные сплавы</kwd><kwd>высокоэнтропийные сплавы</kwd><kwd>сплав Кантора</kwd><kwd>(FeCrNiMnCo)99N1</kwd><kwd>водородная хрупкость</kwd><kwd>водородно-индуцируемая хрупкая зона</kwd><kwd>границы зерен</kwd><kwd>разрушение</kwd><kwd>механические свойства</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The research was supported by the grant of the Russian Science Foundation No. 20-19-00261, https://rscf.ru/project/20-19-00261/. The research was carried out on the equipment of the “Nanotech” Core Facility Centre of the Institute of Strength Physics and Materials Science of Siberian Branch of RAS (ISPMS SB RAS). The authors thank S.V. Astafurov, PhD (Physics and Mathematics), and K.A. Reunova for their help in conducting experimental research. The paper was written on the reports of the participants of the XI International School of Physical Materials Science (SPM-2023), Togliatti, September 11–15, 2023.</funding-statement><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда № 20-19-00261, https://rscf.ru/project/20-19-00261/. Исследования выполнены на оборудовании ЦКП «Нанотех» ИФПМ СО РАН. Авторы благодарны кандидату физико-математических наук С.В. Астафурову и К.А. Реуновой за помощь в проведении экспериментальных исследований. 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