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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="other" 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">557</article-id><article-id pub-id-type="doi">10.18323/2782-4039-2022-3-1-76-84</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></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Simulation of overcoming obstacles in the form of pores by dislocations in tungsten</article-title><trans-title-group xml:lang="ru"><trans-title>Моделирование преодоления препятствий в виде пор дислокациями в вольфраме</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8278-8705</contrib-id><name-alternatives><name xml:lang="en"><surname>Kazakov</surname><given-names>Arseny M.</given-names></name><name xml:lang="ru"><surname>Казаков</surname><given-names>Арсений Максимович</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>arseny.m.kazakov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharapova</surname><given-names>Yuliya R.</given-names></name><name xml:lang="ru"><surname>Шарапова</surname><given-names>Юлия Равильевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>researcher</p></bio><bio xml:lang="ru"><p>научный сотрудник</p></bio><email>ulya_usinsk@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5388-3466</contrib-id><name-alternatives><name xml:lang="en"><surname>Babicheva</surname><given-names>Rita I.</given-names></name><name xml:lang="ru"><surname>Бабичева</surname><given-names>Рита Исмагиловна</given-names></name></name-alternatives><address><country country="SG">Singapore</country></address><bio xml:lang="en"><p>PhD (Physics and Mathematics), researcher of the School of Mechanical and Aerospace Engineering</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, научный сотрудник школы машиностроения и аэрокосмической инженерии</p></bio><email>ri.babicheva@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1332-5125</contrib-id><name-alternatives><name xml:lang="en"><surname>Zinovev</surname><given-names>Alexandr V.</given-names></name><name xml:lang="ru"><surname>Зиновьев</surname><given-names>Александр Викторович</given-names></name></name-alternatives><address><country country="BE">Belgium</country></address><bio xml:lang="en"><p>PhD (Physics and Mathematics), researcher</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, научный сотрудник</p></bio><email>aleksandr.zinovev@sckcen.be</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Terentyev</surname><given-names>Dmitry A.</given-names></name><name xml:lang="ru"><surname>Терентьев</surname><given-names>Дмитрий Александрович</given-names></name></name-alternatives><address><country country="BE">Belgium</country></address><bio xml:lang="en"><p>PhD (Physics and Mathematics), researcher</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, научный сотрудник </p></bio><email>dmitry.terentyev@sckcen.be</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9940-3915</contrib-id><name-alternatives><name xml:lang="en"><surname>Semenov</surname><given-names>Alexandr S.</given-names></name><name xml:lang="ru"><surname>Семенов</surname><given-names>Александр Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Physics and Mathematics), Associate Professor</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, доцент</p></bio><email>sash-alex@yandex.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ufa State Aviation Technical University, Ufa</institution></aff><aff><institution xml:lang="ru">Уфимский государственный авиационный технический университет, Уфа</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Nanyang Technological University, Singapore</institution></aff><aff><institution xml:lang="ru">Наньянский технологический университет, Сингапур</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">SCK-CEN (Belgian Nuclear Research Centre), Mol</institution></aff><aff><institution xml:lang="ru">Бельгийский центр ядерных исследований, Мол</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Mirny Polytechnic Institute (branch) of North-Eastern Federal University, Mirny</institution></aff><aff><institution xml:lang="ru">Политехнический институт (филиал) Северо-Восточного федерального университета им. М.К. Аммосова в г. Мирном, Мирный</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2022</year></pub-date><issue>3-1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>76</fpage><lpage>84</lpage><history><date date-type="received" iso-8601-date="2022-09-30"><day>30</day><month>09</month><year>2022</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://vektornaukitech.ru/jour/article/view/557">https://vektornaukitech.ru/jour/article/view/557</self-uri><abstract xml:lang="en"><p>Tungsten is widely used as a material capable of withstanding working conditions in nuclear reactors and other extreme conditions. Under the influence of irradiation, such defects as Frenkel pairs, pores, and dislocation loops are formed in the metal. Therefore, the research aimed at studying the interactions of these defects with each other and their influence on the mechanical properties of the metal are relevant. The paper presents the theoretical study based on the molecular dynamics method, the purpose of which is to investigate the mechanism of strain hardening of tungsten associated with the interaction of dislocations and pores. The authors solved this problem using the LAMMPS package, carried out the integration of atoms motion equations by the fourth order Verlet method. The model under the study is a single crystal of a certain [111], [–1–12], [1–10] orientation along the basic <italic>X</italic>, <italic>Y</italic>, <italic>and Z </italic>coordinate axis relatively, in which the slip of edge dislocations in the main slip system of BCC metals and their interaction with pores is considered. The authors studied the influence of a pore size on the shear stress magnitude: the growth of pore diameter is proportional to the stress growth. The dependences of shear stress on the shear strain in the temperature range of 600–1400 K are calculated, whereby the temperature change does not significantly influence the stress value. The study shows that dislocations cut the pores and, upon the repeated interaction with a pore, a lower value of peak shear stress is observed than during the first one. The presence of pores leads to the flow stress increase, and such an effect becomes more evident with the increasing pore diameter. The flow stress increases thrice for pores with a diameter of 6 nm compared to the material without pores. The authors described the mechanism of interaction between the edge dislocations and pores under the influence of shear stress.</p></abstract><trans-abstract xml:lang="ru"><p>Вольфрам широко используется в качестве материала, способного выдержать условия работы в ядерных реакторах и других экстремальных условиях. Под воздействием облучения в металле образуются такие дефекты, как пары Френкеля, поры и дислокационные петли. Поэтому важными на сегодняшний день являются исследования, направленные на изучение взаимодействий этих дефектов друг с другом и влияния данных взаимодействий на механические свойства металла. В статье представлено теоретическое исследование, основанное на методе молекулярной динамики, целью которого является изучение механизма деформационного упрочнения вольфрама, связанного с взаимодействием дислокаций с порами. Решение данной задачи получено с использованием пакета LAMMPS. Интегрирование уравнений движений атомов проводится методом Верле четвертого порядка. Исследуемая модель представляет собой монокристалл ориентации [111], [-1-12], [1-10] вдоль основных координатных осей <italic>X</italic>, <italic>Y</italic>, <italic>Z </italic>соответственно, в котором рассматривается скольжение краевых дислокаций в основной системе скольжения металлов с объемно-центрированной кубической кристаллической решеткой и их взаимодействие с порами. Изучено влияние размера пор на величину сдвигающего напряжения: рост диаметра поры пропорционален росту напряжения. Рассчитаны зависимости сдвигающего напряжения от деформации сдвига в интервале температур 600–1400 K, причем изменение температуры не оказывает значительного влияния на величину напряжения. Показано, что дислокации перерезают поры, и при повторном взаимодействии с порой наблюдается меньшее значение пикового сдвигающего напряжения, чем при первом. Присутствие пор приводит к повышению напряжения течения, причем данный эффект становится более заметным с ростом диаметра пор. Для материала с порами диаметром 6 нм напряжение течения возросло в три раза по сравнению с материалом без пор. Описан механизм взаимодействия краевых дислокаций и пор под воздействием сдвигающего напряжения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>tungsten</kwd><kwd>molecular dynamics method</kwd><kwd>pores</kwd><kwd>dislocations</kwd><kwd>defects interaction</kwd><kwd>shear deformation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>вольфрам</kwd><kwd>метод молекулярной динамики</kwd><kwd>поры</kwd><kwd>дислокации</kwd><kwd>взаимодействие дефектов</kwd><kwd>сдвиговая деформация</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The research was financially supported by the Ministry of Science and Higher Education of the Russian Federation within the state assignment of FSBEI HE USATU (agreement No. 075-03-2022-318/1) “Youth Scientific Laboratory of REC “Metals and Alloys at Extreme Conditions” for A.V. Zinovyev (calculations), grant No. NSh-4320.2022.1.2 for A.M. Kazakov (analysis and discussion of obtained results), grant of the Russian Science Foundation No. 21-12-00275 for A.S. Semenov (task description, research conceptualization).</funding-statement><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Министерства науки и высшего образования РФ в рамках государственного задания ФГБОУ ВО «УГАТУ» (соглашение № 075-03-2022-318/1) «Молодежная научно-исследовательская лаборатория НОЦ «Металлы и сплавы при экстремальных воздействиях» для А.В. Зиновьева (проведение расчетов), гранта № НШ-4320.2022.1.2 для А.М. Казакова (анализ и обсуждение полученных результатов), гранта РНФ № 21-12-00275 для А.С. Семенова (постановка задачи, концептуализация исследования).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Golubeva A.V., Cherkez D.I. 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