Effect of Shape of Second Phase Particle on Grain Growth Simulated by Cellular Automaton
Based on the ordinary grain growth cellular automaton(CA) model,the round,square and needle-shaped second phase particles were added,and the effects of second phase particles' shape on grain growth process were simulated and quantitatively analyzed.The results show that the evolution of the microstructure is pinned by the second phase particle,the larger the area fraction of particles,the stronger the overall pinning effect.The needle-shaped second phase particles show a strong pinning effect compared with round and square-shaped particles when the area fraction of the particles is small.With the increases of the area fraction,the shape effect of particles decreases.When the area fraction of the particles is large enough,the shape of particles has little effects on the grain growth.