(山東大學(xué) 材料科學(xué)與工程學(xué)院，濟南 250061)
摘 要: 在現(xiàn)有晶粒長大元胞自動機器(CA)模型的基礎(chǔ)上制定新的轉(zhuǎn)變規(guī)則，使之能夠模擬第二相粒子對晶粒長大過程的影響，且對含有不同尺寸第二相粒子材料的晶粒長大過程進行仿真模擬和定量分析。模擬結(jié)果表明：第二相粒子對基體組織具有釘扎作用，當(dāng)粒子體積分數(shù)一定時，總體釘扎作用隨著粒子尺寸的減小而增強；對于單一粒子而言，大尺寸粒子比小尺寸粒子具有更強的釘扎效果，該結(jié)果能夠準確地反映第二相粒子對晶粒長大過程的影響規(guī)律，與現(xiàn)有的相關(guān)理論相符合。
關(guān)鍵字: 元胞自動機；計算機模擬；晶粒長大；第二相粒子；釘扎
（College of Materials Science and Engineering, Shandong University, Jinan 250061, China）
Abstract:Based on the ordinary grain growth cellular automaton(CA) model, a novel transition rule was established to simulate the influence of second-phase particle size on grain growth process. The influences of second-phase particles with various sizes on grain growth process in the matrix of a two-phase material were simulated and quantitatively analyzed. The results show that the evolution of the microstructure will be pinned by the second phase particle. When the volume fraction of particle is fixed, the effect of pin of the particles increase with the decrease of the particle size. And for a single particle, the influence of large one will be bigger than that of the small one for the single particle. The quantitative relation between grain growth and the second-phase particle size obtained from the simulation is in accordance with the theoretical models.
Key words: cellular automaton; computer simulation; grain growth; second-phase particle; pinning
