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Effects of heat treatment on the microstructure and mechanical properties of Ni3Al-based superalloys: A review

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Abstract

Ni3Al-based alloys have drawn much attention as candidates for high-temperature structural materials due to their excellent comprehensive properties. The microstructure and corresponding mechanical properties of Ni3Al-based alloys are known to be susceptible to heat treatment. Thus, a significant step is to employ various heat treatments to derive the desirable mechanical properties of the alloys. This paper briefly summarizes the recent advances in the microstructure evolution that occurs during the heat treatment of Ni3Al-based alloys. Aside from γ′ phase and γ phase, the precipitations of β phase, α-Cr precipitates, and carbides are also found in Ni3Al-based alloys with the addition of various alloying elements. The evolution in morphology, size, and volume fraction of various types of secondary phases during heat treatment are reviewed, involving γ′ phase, β phase, α-Cr precipitate, and carbides. The kinetics of the growth of precipitates are also analyzed. Furthermore, the influences of heat treatment on the mechanical properties of Ni3Al-based alloys are discussed.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52075373 and 52034004) and the National High Technology Research and Development Program of China (No. 2015AA042504).

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Authors and Affiliations

  1. State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin, 300354, China

    Yu-ting Wu, Chong Li, Ye-fan Li, Jing Wu, Xing-chuan Xia & Yong-chang Liu

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  1. Yu-ting Wu
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  2. Chong Li
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  3. Ye-fan Li
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  4. Jing Wu
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  5. Xing-chuan Xia
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  6. Yong-chang Liu
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Correspondence to Chong Li or Yong-chang Liu.

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Wu, Yt., Li, C., Li, Yf. et al. Effects of heat treatment on the microstructure and mechanical properties of Ni3Al-based superalloys: A review. Int J Miner Metall Mater 28, 553–566 (2021). https://doi.org/10.1007/s12613-020-2177-y

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  • DOI: https://doi.org/10.1007/s12613-020-2177-y

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