Phase composition of heat-resisting alloy modified by ageing and alloyed by rhenium

Nina Koneva, Elena Nikonenko, Natalya Popova, Ivan Gibert, Eduard Kozlov

Результат исследования: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

The paper presents the transmission electron microscope (TEM) investigations of the structure of Ni-Al-Cr-based superalloy which is obtained by directional crystallization technique. The structural TEM investigations are carried out in two stages: 1) annealing at 1150°C for 1 h and 2) annealing at 1100°C for 480 h. The qualitative and quantitative analysis is given for the structure, phase composition and morphology of heat-resisting alloy additionally alloyed by rhenium Re both in the original state and after thermal treatment. The heat-resisting alloy comprises ∼70 at % Ni, ∼17 at % Al and ∼5 at % Cr. The total amount of the primary alloying elements of Mo, W, Ta, Ti, Co, La was ∼7 at % and 0.4 at % Re. It is shown that the structure of the superalloy is represented by (γ + γ′)-phase mixture which has a morphologically correct crystallographic orientation and quasi-monocrystalline structure. σ-phase is formed in this superalloy due to rhenium. Since Re distribution in the alloy is not uniform, only a part of (γ + γ′)-phase quasi-cuboids is distorted. It is shown that Re modification distorts the ideal structure of (γ + γ′)-phase quasi-cuboids and results in the formation of β-, χ-and σ-phases.

Язык оригиналаАнглийский
Заголовок главной публикацииAdvanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
Подзаголовок главной публикацииProceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
ИздательAmerican Institute of Physics Inc.
Том1783
ISBN (электронная версия)9780735414457
DOI
Статус публикацииОпубликовано - 10 ноя 2016
СобытиеInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 - Tomsk, Российская Федерация
Длительность: 19 сен 201623 сен 2016

Конференция

КонференцияInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
СтранаРоссийская Федерация
ГородTomsk
Период19.9.1623.9.16

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Цитировать

Koneva, N., Nikonenko, E., Popova, N., Gibert, I., & Kozlov, E. (2016). Phase composition of heat-resisting alloy modified by ageing and alloyed by rhenium. В Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 (Том 1783). [020096] American Institute of Physics Inc.. https://doi.org/10.1063/1.4966389