关键词: CA法, 动态再结晶, 塑性成形, 组织模拟

Abstract: Based on the fundamental metallurgical principles of metal plastic forming, a novel cellular automaton (CA) model is proposed to simulate the microstructural evolution during plastic deformation. The growth velocity for recrystallized grain is proportional to the driving force of recrystallization, which is determined by the grain boundary energy and dislocation density. At cach increment step, the transformation probability for the neighborhood sites of a recrystallized grain is dependent on its growth velocity. Using the model, dynamic recrystallization processes for different temperatures, strain rates and strains are simulated, and the predictions agree with the experimental results and analysis results by empirical equations. The model is capable of simulating kinetic, microstructure and texture development during recrystallization.

Key words: Cellular automaton method, Dynamic recrystallization, Plastic forming, Simulation of microstructure evolution