期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 932, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.167611
关键词
? -TiAl alloys; Microstructure; Texture; Creep; Fatigue; Tribology
This paper introduces the phase constituents, microstructure control measures, and texture evolutions of γ-TiAl alloys. It summarizes the factors influencing the mechanical properties and fracture mechanisms of γ-TiAl alloys, and proposes future development directions.
Upgrading and developing metallic materials are bases for improving the performance of aircraft. As one of the new structural metallic materials used in aerospace, lightweight and high-strength gamma-TiAl alloys have been successfully used as high-risk structural parts in aircraft engines. Nonetheless, intrinsic embrittlement is the main factor limiting applications of gamma-TiAl alloys. To further enlarge the application fields of gamma-TiAl alloys, it is urgent to improve mechanical properties, like strength and ductility. This paper first introduces phase constituents and precipitates of gamma-TiAl alloys, summarizes microstructure control measures of gamma-TiAl alloys, and presents texture evolutions of gamma-TiAl alloys. Then, based on four strength mechanisms, this review paper summarizes factors influencing mechanical properties of gamma-TiAl alloys during compression, tension, creep and fatigue as well as tribology tests. It also includes the fracture mechanisms of gamma-TiAl alloys. Finally, this paper proposes some future development directions for studying gamma-TiAl alloys, like screening chemical compositions via machine learning technology, and developing microstructure evaluation soft-ware.(c) 2022 Elsevier B.V. All rights reserved.
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