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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">techusgu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Юго-Западного государственного университета. Серия: Техника и технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Southwest State University. Series: Engineering and Technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-1528</issn><publisher><publisher-name>Юго-Западный государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">techusgu-94</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Тепловой механизм воздействия лазерного излучения  на поры в поверхностном слое металлических сплавов</article-title><trans-title-group xml:lang="en"><trans-title>Thermal Mechanism of The Influence of Laser Radiation  on the Pores in the Surface Layer of Metallic Alloys</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>Симонов</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Simonov</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Симонов Юрий Владимирович, аспирант,  ассистент кафедры физики</p><p>Ленинский проспект 4, г. Москва 119049</p></bio><bio xml:lang="en"><p>Yuri V. Simonov, Post-Graduate Student, Assistant of the Department of Physics</p><p>4 Leninsky aven., Moscow 119049</p></bio><email xlink:type="simple">simonov.yuv@mail.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>Ушаков</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ushakov</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ушаков Иван Владимирович, доктор технических наук, профессор, заведующий кафедрой  физики</p><p>Ленинский проспект 4, г. Москва 119049</p><p>Researcher ID: I-9828-2017 </p></bio><bio xml:lang="en"><p>Ivan V. Ushakov, Dr. of Sci. (Engineering), Professor, Head of the Department of Physics</p><p>4 Leninsky aven., Moscow 119049</p></bio><email xlink:type="simple">ushakoviv@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/0000-0003-1231-7411</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дьяков</surname><given-names>И. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дьяков Игорь Алексеевич, кандидат технических наук, доцент кафедры «Информационные процессы и управление»; доцент кафедры физики</p><p>ул. Советская  106, г. Тамбов 392000</p><p>Ленинский проспект 4, г. Москва 119049</p><p> </p></bio><email xlink:type="simple">nanogalvanotech@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology “MISIS”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Тамбовский государственный технический университет; Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tambov State Technical University; National University of Science and Technology “MISIS”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>29</day><month>04</month><year>2023</year></pub-date><volume>11</volume><issue>3</issue><fpage>77</fpage><lpage>92</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Симонов Ю.В., Ушаков И.В., Дьяков И.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Симонов Ю.В., Ушаков И.В., Дьяков И.А.</copyright-holder><copyright-holder xml:lang="en">Simonov Y.V., Ushakov I.V., Дьяков И.А.</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://techusgu.elpub.ru/jour/article/view/94">https://techusgu.elpub.ru/jour/article/view/94</self-uri><abstract><sec><title>Цель исследования</title><p>Цель исследования. Селективная лазерная обработка является перспективным методом формирования механических свойств поверхностного слоя металлических сплавов. Селективность лазерной обработки проявляется в преимущественном воздействии ударной волны и теплового фронта на дефектные области. В результате в дефектных областях идут процессы релаксации механических напряжений, в то время как бездефектный материал не претерпевает существенных изменений. Это позволяет улучшить механические характеристики материала при сохранении его структурного состояния в целом. Дальнейшее развитие метода селективной лазерной обработки требует изучения теплового механизма воздействия лазерного излучения на дефектные области. Целью работы является исследование взаимодействия теплового фронта, инициированного лазерным импульсом, с дефектами поверхностного слоя металлического сплава. </p></sec><sec><title>Методы</title><p>Методы. Исследовали распространение теплового фронта в поверхностном слое титанового сплава, содержащего систему пор, методом конечных разностей, с помощью компьютерного моделирования.  </p></sec><sec><title>Результаты</title><p>Результаты. Предложена модель взаимодействия теплового фронта с системой из трёх пор, расположенной параллельно поверхности образца. Разработанная модель может быть использована для выявления специфики взаимодействия волны прогрева с различными дефектами. Специфика теплового механизма воздействия короткоимпульсного лазерного излучения на поры в поверхностном слое металлических сплавов проявляется в искажении теплового фронта и неравномерности прогрева материала.  </p></sec><sec><title>Заключение</title><p>Заключение. Неравномерность прогрева материала проявляется, в первую очередь, в дефектных областях и может приводить к релаксации напряжений за счёт пластического деформирования нагретого материала. Имеющиеся экспериментальные данные, полученные на образцах, подвергнутых селективной лазерной обработке, свидетельствуют об одновременном увеличении микротвёрдости поверхностного слоя в полтора раза и стойкости к формированию трещин в условиях локального нагружения. </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Purpose</title><p>Purpose. Selective laser treatment is a promising method for creation the mechanical properties of the surface layer of metal alloys. The selectivity of laser processing is manifested in the predominant effect of the shock wave and the heat front on the defective areas. As a result, mechanical stress relaxation processes occur in the defective areas, while the defect-free material does not undergo significant changes. This makes it possible to improve the mechanical characteristics of the material while maintaining its initial structural state as a whole. Further development of the method of selective laser processing requires investigation the thermal mechanism of the effect of laser radiation on defective areas. The aim of the work is to investigate the interaction of the thermal front initiated by a laser pulse with defects in the surface layer of a metal alloy. </p></sec><sec><title>Methods</title><p>Methods. The propagation of a thermal front in the surface layer of a titanium alloy containing a pore system was studied by the finite difference method and using computer modeling. </p></sec><sec><title>Results</title><p>Results. A model of the interaction of the heat front with a system of three pores located parallel to the sample surface is proposed. The developed model can be used to identify the specifics of the interaction of the heating wave with various defects. The specificity of the thermal mechanism of the effect of short-pulse laser radiation on the pores in the surface layer of metal alloys is manifested in the distortion of the thermal front and the non-uniform heating of the material. </p></sec><sec><title>Conclusion</title><p>Conclusion. The non-uniform heating of the material manifests itself, first of all, in the defective areas and can lead to stress relaxation due to plastic deformation of the heated material. The available experimental data obtained on samples subjected to selective laser treatment indicate a simultaneous increase in the microhardness of the surface layer and resistance to crack formation in condition of local loading conditions. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>прогрев поверхности</kwd><kwd>моделирование</kwd><kwd>селективная обработка</kwd><kwd>поры</kwd><kwd>поверхностный слой</kwd></kwd-group><kwd-group xml:lang="en"><kwd>surface heating</kwd><kwd>modeling</kwd><kwd>selective treatment</kwd><kwd>pores</kwd><kwd>surface layer</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта  № 19-33-90039.</funding-statement><funding-statement xml:lang="en">The authors are sincerely grateful to Doctor of Physical and Mathematical Sciences, Professor  D. M. 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