vsgiuВестник Сибирского государственного индустриального университетаBulletin of the Siberian State Industrial University2304 - 44972307-1710Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет"10.57070/2304-4497-2025-4(54)-91-102vsgiu-864Research ArticleРаздел 2. Металлургия и материаловедениеSection 2. Metallurgy and Materials ScienceУСТАНОВЛЕНИЕ ВЛИЯНИЯ УМЗ СТРУКТУРЫ В СПЛАВЕ Ti – Nb НА УСТАЛОСТНУЮ ПРОЧНОСТЬDETERMINATION OF THE EFFECT OF THE UMP STRUCTURE IN Ti – Nb ALLOY ON FATIGUE STRENGTHhttps://orcid.org/0000-0001-8812-9287ЕрошенкоАнна ЮрьевнаEroshenkoAnna Yu.

к.т.н., старший научный сотрудник лаборатории физики наноструктурных биокомпозитов

Cand. Sci. (Eng.), Senior Researcher, Laboratory of Physics of Nanostructured Biocomposites

eroshenko@ispms.ruhttps://orcid.org/0000-0001-5557-5950ГлуховИван АлександровичGluhovIvan A.

к.т.н., младший научный сотрудник лаборатории физики наноструктурных биокомпозитов

Cand. Sci. (Eng.), Junior Researcher, Laboratory of Physics of Nanostructured Biocomposites

gia@ispms.ruhttps://orcid.org/0000-0003-4669-8478ТолмачевАлексей ИвановичTolmachevAleksei I.

главный специалист лаборатории физики наноструктурных биокомпозитов

Chief Specialist of the Laboratory of Physics of Nanostructured Biocomposites

tolmach@ispms.ruhttps://orcid.org/0000-0003-1169-3765УваркинПавел ВикторовичUvarkinPavel V.

ведущий технолог лаборатории физики наноструктурных биокомпозитов

Leading Technologist of the Laboratory of Physics of Nanostructured Biocomposites

uvarkin@ispms.ruhttps://orcid.org/0000-0001-5037-245XШаркеевЮрий ПетровичSharkeevYurii P.

д.ф.-м.н., профессор, заведующий лабораторией физики наноструктурных биокомпозитов

Dr. Sci. (Phys.-Math.), Prof., Head of the Laboratory of Physics of Nanostructured Biocomposites

sharkeev@ispms.ruИнститут физики прочности и материаловедения Сибирского отделения Российской академии наукРоссияInstitute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of SciencesRussian Federation2025291220250491102Copyright © Ерошенко А., Глухов И., Толмачев А., Уваркин П., Шаркеев Ю., 20252025Ерошенко А., Глухов И., Толмачев А., Уваркин П., Шаркеев Ю.Eroshenko A., Gluhov I., Tolmachev A., Uvarkin P., Sharkeev Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.sibsiu.ru/jour/article/view/864

Исследования, связанные с оценкой циклической долговечности разрабатываемых конструкционных материалов для медицины и техники, являются актуальной задачей. Одним из перспективных направлений медицинского материаловедения является разработка биосовместимых        β-сплавов на основе титана с модулем Юнга, сопоставимым со значениями для кортикальной костной ткани (2 ‒ 23 ГПа), в том числе и ультрамелкозернистых (УМЗ) сплавов. Закономерности усталостного разрушения для биосовместимых УМЗ титановых сплавов с низким модулем упругости для режимов много- и гигацикловой усталости мало исследованы и требуют детального анализа. Выполнено исследование особенностей разрушения биосовместимого сплава Ti ‒ 45 мас. % Nb в УМЗ и крупнокристаллическом (КК) состоянии при проведении испытаний на гигацикловую усталость на ультразвуковой резонансной нагружающей машине Shimadzu USF-2000. УМЗ сплав получали комбинированным методом abc-прессования с многоходовой прокаткой. Установлено, что формирование многофазной УМЗ структуры в сплаве Ti – 45 мас. % Nb приводит к повышению предела усталости в 1,5 раза в сравнении с КК структурой. Методом электронной растровой и просвечивающей микроскопии исследована поверхность разрушения образцов сплава в УМЗ и КК состояниях в зонах зарождения и инициирования трещины. Установлено, что характер морфологии поверхности образцов после разрушения титана в КК и УМЗ состояниях подобный. Зоны зарождения и распространения трещины имеют макробороздчатое строение, состоящее из фасеток и ямочного микрорельефа. Показано, что в результате разрушения при гигациклических испытаниях в КК состоянии сплава Ti – 45 мас. % Nb сформировалась ячеисто-сетчатая дислокационная субструктура, а в УМЗ состоянии - фрагментированная субструктура.

Research related to the assessment of the cyclic durability of the developed structural materials for medicine and technology is an urgent task. One of the promising areas of medical materials science is the development of biocompatible β-alloys based on titanium with a Young's modulus comparable to values for cortical bone tissue (2 ‒ 23 GPa), including ultrafine-grained (UMZ) alloys. The patterns of fatigue failure for biocompatible UMS titanium alloys with low modulus of elasticity for multi- and gigacycle fatigue modes have been poorly studied and require detailed analysis. A study of the features of the destruction of a biocompatible Ti ‒ 45 wt alloy has been performed. % Nb in the UMZ and coarse-crystalline (KK) state during gigacycle fatigue tests on the Shimadzu USF-2000 ultrasonic resonant loading machine. The UMZ alloy was obtained by the combined abc-pressing method with multi-pass rolling. It has been established that the formation of a multiphase UMZ structure in the Ti – 45 wt alloy. % Nb leads to an increase in the fatigue limit by 1.5 times in comparison with the CC structure. The fracture surface of alloy samples in UMP and CC states in the nucleation and crack initiation zones was studied by electron scanning and transmission microscopy. It was established that the morphology of the surface of the samples after the destruction of titanium in the CC and UMZ states is similar. The nucleation and propagation zones of the crack have a macrobursted structure consisting of facets and a dimpled microrelief. It is shown that as a result of the destruction during gigacyclic tests in the QC state of the Ti – 45 alloy by weight. % Nb has formed a cellular-mesh dislocation substructure, and in the UMZ state, a fragmented substructure.

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The authors declare that there are no conflicts of interest present.