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晶粒粗化是发生在材料热成形过程中的一种典型的组织演变现象。晶粒粗化可以显著影响材料的力学性能及后续变形特性。采用元胞自动机算法(CellularAutomaton,CA)模拟了晶粒粗化现象,模拟了晶粒粗化过程中粗化动力学、拓扑学及形态学的演化,并研究了温度及时间对粗化过程的影响。模拟结果显示,晶粒的粗化指数为0.5;在粗化过程中,六边形的晶粒占的比例最大,其次为五边形和七边形,而晶粒边数为3或10的晶粒所占比例很低,约为5%左右;组织形态演化表明,随着保温时间的增加或温度的升高,晶粒平均尺寸增大。模拟结果与相关文献中的结论相同。
Grain coarsening is a typical phenomenon of microstructure evolution occurring during thermoforming of materials. Grain coarsening can significantly affect the mechanical properties and subsequent deformation properties of the material. The grain coarsening phenomenon was simulated by CellularAutomaton (CA), and the coarsening kinetics, topology and morphological evolution in grain coarsening process were simulated. The effect of temperature and time on the coarsening process Impact. The simulation results show that the grain coarsening index is 0.5; in the roughening process, the hexagonal grains occupy the largest proportion, followed by the pentagons and heptags, while the grain side number is 3 or 10 The proportion of grains is very low, about 5%. The evolution of the microstructure shows that the average grain size increases with the increase of holding time or temperature. The simulation results are the same as those in the related literature.