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Article Navigation >  International Journal of Minerals, Metallurgy and Materials  > 2020 > Accepted Manuscript

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Invited Review

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

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  • Received: 12 June 2020; Revised: 25 August 2020; Accepted: 25 August 2020; Available online: 27 August 2020
  • Recently, Ni3Al-based alloys have drawn much attention as candidates for high-temperature structural materials due to its excellent comprehensive properties. The microstructure and corresponding mechanical properties of Ni3Al-based alloys are known to be susceptible to the heat treatment. Thus, it is of significance to employ various heat treatments to get the desirable mechanical properties of the alloys. This paper briefly summarized the recent advances about the microstructure evolution which occurs during the heat treatment of Ni3Al-based alloys. Besides of γ' phase and γ phase, the precipitations of β phase, α-Cr precipitates and carbides are also found in Ni3Al-based alloys with various addition of 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, and 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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Effects of heat treatment on the microstructure and mechanical properties of Ni3Al-based superalloys: A review

  • Corresponding authors:

    Chong Li    E-mail: lichongme@tju.edu.cn

    Yong-chang Liu    E-mail: ycliu@tju.edu.cn

  • State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, China
    Received: 12 June 2020
    Revised: 25 August 2020
    Accepted: 25 August 2020
    Available online: 27 August 2020

Abstract: Recently, Ni3Al-based alloys have drawn much attention as candidates for high-temperature structural materials due to its excellent comprehensive properties. The microstructure and corresponding mechanical properties of Ni3Al-based alloys are known to be susceptible to the heat treatment. Thus, it is of significance to employ various heat treatments to get the desirable mechanical properties of the alloys. This paper briefly summarized the recent advances about the microstructure evolution which occurs during the heat treatment of Ni3Al-based alloys. Besides of γ' phase and γ phase, the precipitations of β phase, α-Cr precipitates and carbides are also found in Ni3Al-based alloys with various addition of 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, and 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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