DETERMINATION OF THE EFFECT OF THE UMP STRUCTURE IN Ti – Nb ALLOY ON FATIGUE STRENGTH
- Authors: Eroshenko A.1, Gluhov I.2, Tolmachev A.2, Uvarkin P.1, Sharkeev Y.2
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Affiliations:
- Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
- Siberian Branch of the Russian Academy of Sciences
- Issue: No 4 (2025)
- Section: Статьи
- URL: https://ogarev-online.ru/2304-4497/article/view/380624
- ID: 380624
Cite item
Abstract
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.
About the authors
Anna Yu. Eroshenko
Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
Author for correspondence.
Email: eroshenko@ispms.ru
ORCID iD: 0000-0001-8812-9287
SPIN-code: 4097-7039
Russian Federation
Ivan A. Gluhov
Siberian Branch of the Russian Academy of Sciences
Email: gia@ispms.ru
ORCID iD: 0000-0001-5557-5950
SPIN-code: 4584-1195
Aleksei I. Tolmachev
Siberian Branch of the Russian Academy of Sciences
Email: tolmach@ispms.ru
ORCID iD: 0000-0003-4669-8478
Pavel V. Uvarkin
Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
Email: uvarkin@ispms.ru
ORCID iD: 0000-0003-1169-3765
SPIN-code: 4944-4711
Yurii P. Sharkeev
Siberian Branch of the Russian Academy of Sciences
Email: sharkeev@ispms.ru
ORCID iD: 0000-0001-5037-245X
SPIN-code: 1844-5410
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