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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">10.17073/0368-0797-2023-6-681-687</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2661</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>МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIAL SCIENCE</subject></subj-group></article-categories><title-group><article-title>Теоретическая прочность аустенита при наличии в кристалле поры или вакансий: молекулярно-динамическое исследование</article-title><trans-title-group xml:lang="en"><trans-title>Theoretical strength of austenite in the presence of a pore or vacancies in the crystal: Molecular dynamics study</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5748-813X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зоря</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zorya</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Васильевна Зоря, д.ф.-м.н., доцент, заведующий кафедрой теплогазоводоснабжения, водоотведения и вентиляции</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Irina V. Zorya, Dr. Sci. (Phys.-Math.), Assist. Prof., Head of the Chair of Heat-Gas-Water Supply, Water Disposal and Ventilation</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p></bio><email xlink:type="simple">zorya.i@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/0000-0002-5252-2455</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Полетаев</surname><given-names>Г. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Poletaev</surname><given-names>G. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Геннадий Михайлович Полетаев, д.ф.-м.н., профессор, заведующий кафедрой высшей математики</p><p>Россия, 656038, Алтайский край, Барнаул, пр. Ленина, 46</p></bio><bio xml:lang="en"><p>Gennadii M. Poletaev, Dr. Sci. (Phys.-Math.), Prof., Head of the Chair of Advanced Mathematics</p><p>46 Lenina Ave., Barnaul, Altai Territory 656038, Russian Federation</p></bio><email xlink:type="simple">gmpoletaev@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6341-2761</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ракитин</surname><given-names>Р. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Rakitin</surname><given-names>R. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Роман Юрьевич Ракитин, к.ф.-м.н., доцент, директор колледжа</p><p>Россия, 656038, Алтайский край, Барнаул, Комсомольский пр., 100</p></bio><bio xml:lang="en"><p>Roman Yu. Rakitin, Cand. Sci. (Phys.-Math.), Assist. Prof., Director of College</p><p>100 Komsomol’skii Ave., Barnaul, Altai Territory 656038, Russian Federation</p></bio><email xlink:type="simple">movehell@gmail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный индустриальный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Industrial University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Алтайский государственный технический университет им. И.И. Ползунова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Polzunov Altai State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Алтайский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Altai 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>29</day><month>12</month><year>2023</year></pub-date><volume>66</volume><issue>6</issue><fpage>681</fpage><lpage>687</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зоря И.В., Полетаев Г.М., Ракитин Р.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Зоря И.В., Полетаев Г.М., Ракитин Р.Ю.</copyright-holder><copyright-holder xml:lang="en">Zorya I.V., Poletaev G.M., Rakitin R.Y.</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/2661">https://fermet.misis.ru/jour/article/view/2661</self-uri><abstract><p>Методом молекулярной динамики проведено исследование влияния поры разного диаметра, а также соответствующей концентрации отдельных вакансий на теоретическую прочность аустенита при разной температуре. Деформация в модели осуществляется путем сдвига с постоянной скоростью 20 м/с. Рассматривается сдвиг вдоль двух направлений: [ \(\bar 1\ \bar 1\) 2] и [<xref ref-type="bibr" rid="cit111">111</xref>]. Расчетная ячейка аустенита имеет форму прямоугольного параллелепипеда длиной 14,0 нм, высотой 14,0 нм и шириной 5,1 нм. Для описания межатомных взаимодействий использовался ЕАМ потенциал Лау, хорошо воспроизводящий структурные, энергетические и упругие характеристики аустенита. Кривые напряжение – деформация, полученные для обоих рассматриваемых направлений сдвига, имеют аналогичный вид. В отсутствие источников дислокаций пластическая деформация осуществляется путем формирования дислокационных диполей (дислокаций с противоположными векторами Бюргерса). Наличие поры существенно снижает предельную прочность аустенита. Обнаружено, что случайно разбросанные по объему расчетной ячейки одиночные вакансии также приводят к снижению предельной прочности, но, естественно, не так сильно, как пора. Испускание дислокаций порой при деформации происходит путем формирования дислокационных петель, как правило, сразу в двух плоскостях скольжения. Сильнее влияние поры и вакансий на предельную прочность наблюдается при низких температурах. При увеличении температуры влияние дефектов на критическое напряжение, при котором происходит образование дислокаций, снижается. С увеличением размера поры, как и концентрации вакансий, прочность уменьшается. При этом наиболее сильная зависимость наблюдается для пор диаметром до 1 нм. Влияние концентрации вакансий в рассматриваемом диапазоне на предельную прочность оказалось сравнительно более плавное и почти линейное.</p></abstract><trans-abstract xml:lang="en"><p>The molecular dynamics method was used to study the influence of pores of different diameters, as well as the corresponding concentration of individual vacancies, on the theoretical strength of austenite at different temperatures. The deformation in the model was carried out by shear at a cons­tant rate of 20 m/s. We considered a shear along two directions: [ \(\bar 1\ \bar 1\) 2] and [<xref ref-type="bibr" rid="cit111">111</xref>]. The computational austenite cell had the shape of a rectangular parallelepiped 14.0 nm long, 14.0 nm high, and 5.1 nm wide. To describe interatomic interactions, the Lau EAM potential was used, which reproduces well the structural, energy, and elastic characteristics of austenite. The stress-strain curves obtained for both considered shear directions had a similar form. In the absence of dislocation sources, plastic deformation was carried out by the formation of dislocation dipoles (dislocations with opposite Burgers vectors). The presence of a pore significantly reduced the yield strength of austenite. In this case, it was found that single vacancies randomly scattered over the volume of the computational cell also lead to a decrease in the yield strength, but, of course, not as much as the pore. The emission of dislocations during deformation occurred by the formation of dislocation loops, as a rule, in two slip planes at once. The effect of pores and vacancies on the yield strength was stronger at low temperatures. As the temperature increased, the effect of defects on the critical stress at which dislocations were formed decreased. With an increase in the pore size, as well as the concentration of vacancies, the yield strength decreased. In this case, the strongest dependence was observed for pores up to 1 nm in diameter. The influence of the concentration of vacancies in the considered range on the yield strength turned out to be comparatively smoother and almost linear.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>молекулярная динамика</kwd><kwd>аустенит</kwd><kwd>дислокация</kwd><kwd>пора</kwd><kwd>вакансия</kwd><kwd>теоретическая прочность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>molecular dynamics</kwd><kwd>austenite</kwd><kwd>dislocation</kwd><kwd>pore</kwd><kwd>vacancy</kwd><kwd>theoretical strength</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">Seppälä E.T., Belak J., Rudd R.E. Three-dimensional molecular dynamics simulations of void coalescence during dynamic fracture of ductile metals. Physical Review B. 2005;71(6):064112. https://doi.org/10.1103/PhysRevB.71.064112</mixed-citation><mixed-citation xml:lang="en">Seppälä E.T., Belak J., Rudd R.E. 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