CAJ | 학술논문

采用元胞自动机结合Laasraoui?Jonas 位错密度模型(LJ模型)模拟AZ31镁合金在动态再结晶过程中的位错密度和微观组织演化。LJ模型中的硬化参数、回复参数和应变速率灵敏系数决定模拟的准确性。在目前的研究中，基于 LJ 模型和 Kocks?Mecking 模型(KM 模型)求解硬化参数；采用动态再结晶中的稳态应力公式求解回复参数和应变速率灵敏系数。结果表明：模拟结果与实验结果一致。
채용원포자동궤결합Laasraoui?Jonas 위착밀도모형(LJ모형)모의AZ31미합금재동태재결정과정중적위착밀도화미관조직연화。LJ모형중적경화삼수、회복삼수화응변속솔령민계수결정모의적준학성。재목전적연구중，기우 LJ 모형화 Kocks?Mecking 모형(KM 모형)구해경화삼수；채용동태재결정중적은태응력공식구해회복삼수화응변속솔령민계수。결과표명：모의결과여실험결과일치。
The dynamic recrystallization (DRX) process of AZ31 magnesium alloy including microstructure and dislocation density evolution during hot compression was simulated by adopting the cellular automaton (CA) method coupling the Laasraoui?Jonas model (LJ model). The reliability of simulation depended on the accuracy of the hardening parameter, the recovery parameter and the strain rate sensitivity in the LJ model. The hardening parameter was calculated in terms of the LJ model and the Kocks?Mecking model (KM model), and then the recovery parameter and the strain rate sensitivity were obtained by using the equation of steady state flow stress for DRX. Good agreements between the simulations and the experimental observations were achieved.