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.

Ni ₃ Al基合金由于其优异的综合性能而成为高温结构材料的候选者，引起了广泛的关注。已知Ni ₃ Al基合金的微观结构和相应的机械性能易于热处理。因此，重要的一步是采用各种热处理来获得所需的合金机械性能。本文简要总结了在Ni ₃ Al基合金热处理过程中发生的微观组织演变的最新进展。在Ni _3中，除了γ′相和γ相以外，还发现了β相的析出物，α-Cr的析出物和碳化物。铝基合金，并添加了各种合金元素。综述了热处理过程中各种类型次生相的形貌，尺寸和体积分数的变化，涉及γ′相，β相，α-Cr析出物和碳化物。还分析了沉淀物生长的动力学。此外，讨论了热处理对Ni ₃ Al基合金力学性能的影响。