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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">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2025-91-8-75-84</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2578</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>МЕХАНИКА МАТЕРИАЛА: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIALS MECHANICS: STRENGTH, DURABILITY, SAFETY</subject></subj-group></article-categories><title-group><article-title>Исследование микропластической деформации вольфрамовых сплавов W-Ni-Fe при испытаниях на сжатие</article-title><trans-title-group xml:lang="en"><trans-title>Study of microplastic deformation of W-Ni-Fe tungsten alloys during compression tests</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>Мелехин</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Melekhin</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Николай Владимирович Мелехин</p><p>603022, г. Нижний Новгород, просп. Гагарина, д. 23</p></bio><bio xml:lang="en"><p>Nikolay V. Melekhin</p><p>23, prosp. Gagarina, Nizhny Novgorod, 603022</p></bio><email xlink:type="simple">melehin@nifti.unn.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>Чуприянова</surname><given-names>В. Д</given-names></name><name name-style="western" xml:lang="en"><surname>Chupriyanova</surname><given-names>V. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владислава Денисовна Чуприянова</p><p>603022, г. Нижний Новгород, просп. Гагарина, д. 23</p></bio><bio xml:lang="en"><p>Vladislava D. Chupriyanova</p><p>23, prosp. Gagarina, Nizhny Novgorod, 603022</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирнов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Сергеевич Смирнов</p><p>603022, г. Нижний Новгород, просп. Гагарина, д. 23</p><p>606002, Нижегородская обл., г. Дзержинск, просп. Свердлова, д. 11А</p></bio><bio xml:lang="en"><p>Aleksandr S. Smirnov</p><p>23, prosp. Gagarina, Nizhny Novgorod, 603022</p><p>11A, prosp. Sverdlova, Dzerzhinsk, Nizhegorodskaya obl., 606002</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Лобачевского</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lobachevsky University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет Лобачевского; Государственный НИИ машиностроения им. В. В. Бахирева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lobachevsky University; V. V. Bakhirev Institute of Mechanical Engineering</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>31</day><month>08</month><year>2025</year></pub-date><volume>91</volume><issue>8</issue><fpage>75</fpage><lpage>84</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мелехин Н.В., Чуприянова В.Д., Смирнов А.С., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Мелехин Н.В., Чуприянова В.Д., Смирнов А.С.</copyright-holder><copyright-holder xml:lang="en">Melekhin N.V., Chupriyanova V.D., Smirnov A.S.</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://www.zldm.ru/jour/article/view/2578">https://www.zldm.ru/jour/article/view/2578</self-uri><abstract><p>Широкое применение тяжелых вольфрамовых сплавов (ТВС) в энергетике и машиностроении стимулирует разработку новых методов синтеза, обработки порошков и спекания, включая аддитивные технологии. Вместе с тем механизмы микропластической деформации ТВС и их связь с межфазными границами остаются малоизученными. В работе представлены результаты исследования особенностей микропластической деформации в крупнозернистых ТВС с различным уровнем прочности. Исследовали ТВС с различным начальным размером зерна. Образцы испытывали в исходном состоянии и после отжига в вакууме при 1400 °C — температуре плавления γ-фазы. Микропластические испытания проводили с использованием стандартной методики релаксационных испытаний плоских микрообразцов на сжатие. Анализировали микроструктуру образцов после нагружения (при напряжениях меньше и больше предела текучести). Показано, что деформация чистого вольфрама при напряжениях, близких к пределу текучести, приводит к образованию дислокационных «ступенек» в объеме зерен и появлению зернограничных микротрещин. В крупнозернистом деформационно-упрочненном ТВС образование дислокационных «ступенек» начинается в области микропластической деформации при напряжениях меньше предела текучести. При повышении напряжения увеличиваются размер и число следов выхода дислокаций на поверхность зерен. Деформированный ТВС обладает высоким коэффициентом Холла – Петча вследствие повышенной плотности дислокаций в межфазных границах. Отжиг деформированного ТВС приводит к снижению плотности дефектов деформационного происхождения и росту концентрации атомов в межфазных границах. При деформации мелкозернистого ТВС образование дислокационных «ступенек» не наблюдается, что свидетельствует о существенном вкладе пластичных межфазных границ в процесс деформации. Полученные результаты могут быть использованы при производстве ТВС для применения в атомной и авиакосмической отраслях промышленности.</p></abstract><trans-abstract xml:lang="en"><p>The widespread use of heavy tungsten alloys (HTAs) in power engineering and mechanical engineering stimulates the development of new methods of synthesis, powder processing and sintering, including additive technologies. At the same time, the mechanisms of HTAs microplastic deformation and their relationship with interphase boundaries remain poorly understood. The paper presents the results of a study of the features of microplastic deformation in coarse-grained HTAs with different strength levels. HTAs with different initial grain sizes were studied. The samples were tested in the initial state and after annealing in a vacuum at 1400°C, the melting point of the γ-phase. Microplastic tests were carried out using the standard technique of relaxation tests of flat microspecimens for compression. The microstructure of the samples was analyzed after loading (at stresses less than and greater than the yield strength). It is shown</p><p>that the deformation of pure tungsten at stresses close to the yield strength leads to the formation of dislocation «steps» in the volume of grains and the appearance of grain-boundary microcracks. In coarse-grained strain-hardened HTAs, the formation of dislocation «steps» begins in the region of microplastic deformation at stresses below the yield point. With increasing stress, the size and number of traces of dislocations emerging on the grain surface increase. Deformed HTAs have a high Hall-Petch coefficient due to the increased dislocation density in the interphase boundaries. Annealing of deformed HTAs leads to a decrease in the density of deformation-induced defects and an increase in the concentration of atoms in the interphase boundaries. During deformation of fine-grained HTAs, the formation of dislocation «steps» is not observed, which indicates a significant contribution of plastic interphase boundaries to the deformation process. The results obtained can be used in the manufacture of HTAs for use in the nuclear and aerospace industries.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>вольфрамовый сплав</kwd><kwd>деформация</kwd><kwd>микроструктура</kwd><kwd>дислокации</kwd><kwd>релаксационные испытания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>tungsten alloy</kwd><kwd>deformation</kwd><kwd>microstructure</kwd><kwd>dislocation</kwd><kwd>microhardness</kwd><kwd>stress relaxation test</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">Sahin Y. Recent progress in processing of tungsten heavy alloys / J. Powder Technol. 2014. Vol. 3 – 4. P. 1 – 22. 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