基于三维相场模型,研究了弹性能对γ′相颗粒形貌、取向和多颗粒合并行为的影响,以及沉淀相体积分数对γ′相颗粒数目、平均尺寸和尺寸分布的影响。结果表明:弹性能作用下γ′颗粒形貌为立方体形或者长方体形,且沿<100>弹性软方向分布。弹性能对同相多颗粒合并行为的影响主要取决于与颗粒分布、尺寸及畴界间距等有关的弹性交互作用。随着沉淀相体积分数的增加,颗粒数目先增加至最大值后减少,颗粒平均尺寸逐渐增加。 Based on the three-dimensional phase field model, the effect of elastic energy on the morphology, orientation and multi-particle coalescence of γ ’phase particles and the effect of volume fraction of precipitated particles on the number, average size and size distribution of γ’ phase particles were studied. The results show that the γ ’particle morphology is cubic or rectangular parallelepiped under elastic energy and distributed in the direction of <100> elastic softness. The effect of elastic properties on in-phase multiparticle consolidation behavior depends primarily on the elastic interactions associated with particle distribution, size, and boundary spacing. With the increase of the volume fraction of precipitated phase, the number of particles first increases and then decreases to the maximum, and the average particle size gradually increases.