Effect of Microstructural Features of Titanium Alloys on Fatigue Properties and Mechanism of Crack Nucleation in Region of Very High Cycle Fatigue
- Авторлар: Nikitin A.D.1,2, Shanyavskii A.A.3, Beklemishev N.N.1, Porokhov V.V.1, Barsegyan O.S.1
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Мекемелер:
- MAI—National Research University
- ICAD, Russian Academy of Sciencies
- Air Registration Board of the Russian Federation
- Шығарылым: Том 9, № 4 (2018)
- Беттер: 612-619
- Бөлім: Article
- URL: https://journals.rcsi.science/2075-1133/article/view/207518
- DOI: https://doi.org/10.1134/S207511331804024X
- ID: 207518
Дәйексөз келтіру
Аннотация
This work considers the problem of subsurface fatigue crack nucleation and decrease in fatigue properties in two-phase titanium alloys at very high cycle fatigue (VHCF). Analysis of microstructure of alloy VT3-1 obtained by two different technological processes, punching and extrusion, is performed. It is shown that main features of the microstructure of alloy VT3-1 are inhomogeneity of size and shape of the structural elements of the α phase. Agglomerations of globular structural elements of the α phase as well as “macrozones” of acicular plates are found for the forged alloy. As for the extruded VT3-1 it is shown that the inhomogeneity of the microstructure is connected with the regions where acicular plates of the α phase are formed within the primary β grains. In this case, their direction does not coincide with the direction of extrusion. Nonmetallic inclusions are found neither in the forged nor in the extruded titanium alloy VT3-1.
Негізгі сөздер
Авторлар туралы
A. Nikitin
MAI—National Research University; ICAD, Russian Academy of Sciencies
Хат алмасуға жауапты Автор.
Email: nikitin_alex@bk.ru
Ресей, Moscow; Moscow
A. Shanyavskii
Air Registration Board of the Russian Federation
Email: nikitin_alex@bk.ru
Ресей, Airport Sheremetyevo 1, Moscow
N. Beklemishev
MAI—National Research University
Email: nikitin_alex@bk.ru
Ресей, Moscow
V. Porokhov
MAI—National Research University
Email: nikitin_alex@bk.ru
Ресей, Moscow
O. Barsegyan
MAI—National Research University
Email: nikitin_alex@bk.ru
Ресей, Moscow
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