Effect of Temperature on the Low-Cycle Fatigue Characteristics of Single Crystals Made of an Ni3Al-Based Rhenium-Containing Intermetallic Alloy
- Autores: Povarova K.1, Bazyleva O.2, Gorbovets M.2, Drozdov A.1,3, Bulakhtina M.1
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Afiliações:
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
- All-Russia Research Institute of Aviation Materials
- Bardin Central Research Institute for Ferrous Metallurgy
- Edição: Volume 2019, Nº 7 (2019)
- Páginas: 687-693
- Seção: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/173341
- DOI: https://doi.org/10.1134/S0036029519070115
- ID: 173341
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Resumo
Abstract—The low-cycle fatigue (LCF) of the single crystals made of a γ'-Ni3Al-based VKNA-25 γ' + γ nickel superalloy is studied at 104 cycles and a temperature of 20, 750, and 900°C. A temperature anomaly in the LCF fatigue limit of the VKNA alloy, namely, its increase with temperature in the range from 20 to 750°C, is detected. This anomaly is related to a change from octahedral to cubic slip at the temperature of the peak in L12-ordered alloys and to a change in the properties of the γ' and γ phases. At normal temperature, the static tensile strength and the LCF characteristics of the [111] single crystals are higher than those of the single crystals with other crystallographic orientations (CGOs). The static tensile strengths of the [001] and [111] single crystals at 900°C and the strengths of the single crystals with all CGOs at 1000°C are almost the same, and the LCF fatigue limit of the [001] single crystals at 900°C is slightly higher than that of the [111] single crystals.
Sobre autores
K. Povarova
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Autor responsável pela correspondência
Email: povarova@imet.ac.ru
Rússia, Moscow, 119991
O. Bazyleva
All-Russia Research Institute of Aviation Materials
Email: povarova@imet.ac.ru
Rússia, Moscow, 105005
M. Gorbovets
All-Russia Research Institute of Aviation Materials
Email: povarova@imet.ac.ru
Rússia, Moscow, 105005
A. Drozdov
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences; Bardin Central Research Institute for Ferrous Metallurgy
Email: povarova@imet.ac.ru
Rússia, Moscow, 119991; Moscow, 105005
M. Bulakhtina
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Email: povarova@imet.ac.ru
Rússia, Moscow, 119991