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Research Progress of Directionally Solidified Superalloy for Gas Turbine Blade
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Affiliation:

1.School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;2.State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China

Clc Number:

TG132.3+3

Fund Project:

the Fundamental Research Funds for the Central Universities, the Key Basic Research Program of Zhejiang Province

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    Abstract:

    Directionally solidified superalloys are widely used in turbine blades of advanced power propulsion systems such as industrial gas turbines due to their excellent high-temperature strength, creep resistance, corrosion and oxidation resistance, as well as good structural stability and casting properties. Directionally solidified superalloys for gas turbines have been developed from the first generation to the fourth generation by adjusting the proportions of different solid solution strengthening, precipitation strengthening and grain boundary strengthening elements. The intragranular structures are mainly composed of γ phase and γ? phase. There are carbides, borides and other precipitates at the grain boundaries that can pin the grain boundaries. Under the joint influence of these strengthening phases, nickel-based directionally solidified superalloys have better tensile and creep properties that can change with temperature. Starting with the composition characteristics and microstructure characteristics, this article combines the current application status of directionally solidified superalloys in gas turbines, and further analyzes its performance characteristics. Finally, it looks forward to future research on directionally solidified superalloys.

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[Fan Yunpeng, Zhao Xinbao, Zhou Yu, Xia Wanshun, Yue Quanzhao, Gu Yuefeng. Research Progress of Directionally Solidified Superalloy for Gas Turbine Blade[J]. Rare Metal Materials and Engineering,2025,54(4):1053~1071.]
DOI:10.12442/j. issn.1002-185X.20230787

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History
  • Received:December 04,2023
  • Revised:December 21,2023
  • Adopted:January 05,2024
  • Online: April 23,2025
  • Published: April 21,2025