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为了理解颗粒钉扎作用,应用多序参量晶粒长大相场模型,采用周期性边界条件,研究了三维条件下第二相颗粒的尺寸分布、体积分数、空间分布对基体晶粒长大的影响。结果表明,由于钉扎作用,含第二相颗粒的基体晶粒尺寸更加均匀,呈正态分布;与颗粒尺寸正态分布的基体相比,颗粒尺寸均匀分布的基体晶粒尺寸分布更宽;基体晶粒尺寸随第二相体积分数的增大而减小;晶粒平均半径随着颗粒分布不均匀程度的增加而降低,但当第二相颗粒均匀分布在基体中时,晶粒平均半径最小。
In order to understand the pinning effect of particles, the multiphase parameter grain growth phase field model was applied. The periodic boundary conditions were used to study the effect of size distribution, volume fraction and spatial distribution of second phase particles on the growth of matrix grains influences. The results show that due to the pinning effect, the grain size of the matrix containing the second phase particles is more uniform and normal, and the grain size distribution of the matrix particles with a uniform particle size distribution is wider than that of the matrix with the normal particle size distribution. The grain size of the matrix decreases with the increase of the volume fraction of the second phase. The average radius of the grains decreases with the increase of the particle size distribution. However, when the second phase particles are uniformly distributed in the matrix, Min.