cvmetИзвестия вузов. Цветная металлургияIzvestiya. Non-Ferrous Metallurgy0021-34382412-8783НИТУ "МИСИС"10.17073/0021-3438-2023-4-35-47cvmet-1518Research ArticleМеталловедение и термическая обработкаPhysical Metallurgy and Heat TreatmentСовершенствование режима селективного лазерного плавления для изготовления пористых структур из сплава Ti–6Al–4V медицинского назначенияImprovement of selective laser melting regimes for the fabrication of Ti–6Al–4V porous structures for medical applicationshttps://orcid.org/0000-0002-2086-0628ШереметьевВ. А.SheremetyevV. A.

Вадим Алексеевич Шереметьев – кандидат технических наук, ведущий научный сотрудник кафедры обработки  металлов  давлением (ОМД)

119049, г. Москва, Ленинский пр-т, 4, стр. 1

Vadim A. Sheremetyev – Cand. Sci. (Eng.), Leading Researcher, Metal Forming Department

4 bld. 1 Leninskiy Prosp., Moscow 119049

vadim.sheremetyev@gmail.comhttps://orcid.org/0000-0002-7568-2005ЛезинВ. Д.LezinV. D.

Вячеслав Дмитриевич Лезин – аспирант, лаборант-исследователь кафедры ОМД

119049, г. Москва, Ленинский пр-т, 4, стр. 1

Viacheslav D. Lezin – Postgraduate, Research Laboratory Assistant, Metal Forming Department

4 bld. 1 Leninskiy Prosp., Moscow 119049

vyacheslavlezin@gmail.comhttps://orcid.org/0009-0001-9857-973XКозикМ. В.KozikM. V.

Марина Владимировна Козик – студент-магистр, лаборант-исследователь кафедры ОМД

119049, г. Москва, Ленинский пр-т, 4, стр. 1

Marina V. Kozik – Master Student, Research Laboratory Assistant, Metal Forming Department

4 bld. 1 Leninskiy Prosp., Moscow 119049

marinakozik627@gmail.comhttps://orcid.org/0009-0001-7237-3872МолчановС. А.MolchanovS. A.

Сергей Алексеевич Молчанов – начальник службы качества

125413, г. Москва, ул. Онежская, 24/1

Sergey A. Molchanov – Head of Quality Service

24/1 Onezhskaya Str., Moscow 125413

molchanov@conmet.ruНациональный исследовательский технологический университет «МИСИС»РоссияNational University of Science and Technology “MISIS”Russian FederationООО «Конмет»РоссияLLC “Conmet”Russian Federation202321082023043547Copyright © Шереметьев В.А., Лезин В.Д., Козик М.В., Молчанов С.А., 20232023Шереметьев В.А., Лезин В.Д., Козик М.В., Молчанов С.А.Sheremetyev V.A., Lezin V.D., Kozik M.V., Molchanov S.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://cvmet.misis.ru/jour/article/view/1518

Разработаны подходы к оптимизации режима селективного лазерного плавления (СЛП) для получения пористых материалов из сплава Ti–6Al–4V медицинского назначения с тонкими конструкционными элементами и низким уровнем дефектной пористости. Улучшенное проплавление тонких элементов с применением разработанных экспериментальных режимов СЛП достигается за счет значительного снижения расстояния между проходами лазера (с 0,11 до 0,04–0,05 мм), а баланс между плотностью энергии лазера и скоростью построения скомпенсирован путем изменения скорости пробега и мощности лазера. Результаты изучения дефектной пористости и твердости образцов, изготовленных по экспериментальным режимам СЛП, позволили установить 3 наиболее перспективных набора параметров, один из которых выбран для исследования механических свойств в сравнении со стандартным режимом СЛП. Для этого исследования разработаны и изготовлены образцы на основе структур типа ромбического додекаэдра и полиэдра Вороного пористостью 70–75 %. Установлено, что снижение уровня дефектной пористости с ≈1,8 % до 0,6 %, обеспеченное применением разработанного режима СЛП, способствует значительному повышению прочностных характеристик материала. Увеличение условного предела текучести ромбического додекаэдра с 76 до 132 МПа и Вороного с 66 до 86 МПа. При этом сохраняется низкий модуль Юнга (1–2 ГПа), соответствующий уровню жесткости губчатой костной ткани.

This article describes approaches to the optimization of regimes of selective laser melting (SLM) used in the fabrication of porous materials from medical grade Ti–6Al–4V alloy with thin structural elements and a low level of defect porosity. Improved fusion of thin elements based on SLM regimes is achieved due to a significant decrease in the distance between laser passes (from 0.11 to 0.04–0.05 mm). Moreover, the balance between the laser energy density and building rate is compensated by changing the laser speed and laser power. The results of the study of defect porosity and hardness of samples fabricated according to experimental SLM regimes allowed three promising sets of parameters to be defined. One was selected for studying mechanical properties in comparison with the reference SLM regime. In the aims of this study, the samples were developed and fabricated using the structures of rhombic dodecahedron and Voronoi types with a porosity of 70–75 %. The decrease in defect porosity was established at ≈1.8 % to 0.6 %, depending on the SLM regime. This promotes a significant increase in strength properties of the material, including an increase in the yield  strength  of  rhombic dodecahedron from 76 to 132 MPa and the Voronoi structure from 66 to 86 MPa. The low Young module (1–2 GPa) remains, corresponding to the rigidity level of spongy bone tissue.

селективное лазерное плавлениетитановые сплавыпористые структурымикроструктурапористостьмеханические свойстваselective laser meltingtitanium alloysporous structuresmicrostructureporositymechanical propertiesРабота выполнена за счет гранта Российского научного фонда № 22-79-10299, https://rscf.ru/project/22-79-10299/This work was supported by Grant No. 22-79-10299 of the Russian Science Foundation, https://rscf.ru/project/22-79-10299/ReferencesShunyu Liu, Yung C. Shin, Additive manufacturing of Ti6Al4V alloy: A review. Materials & Design. 2019; 164:107552. https://doi.org/10.1016/j.matdes.2018.107552Shunyu Liu, Yung C. Shin, Additive manufacturing of Ti6Al4V alloy: A review. Materials & Design. 2019; 164:107552. https://doi.org/10.1016/j.matdes.2018.107552Chlebus E., Kuźnicka B., Kurzynowski T., Dybała B. Microstructure and mechanical behaviour of Ti—6Al—7Nb alloy produced by selective laser melting. 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The authors declare that there are no conflicts of interest present.