Abstract This work describes the coupling of a level-set (LS) based numerical framework for microstructural evolutions modeling with a crystal plasticity finite element method (CPFEM), in order to propose a new full field approach dedicated to dynamic recrystallization (DRX) modeling. These developments are proposed for 3D polycrystalline metals subjected to large deformations at high temperatures. CPFEM is one of the best available alternatives to model the evolution of dislocation densities and misorientation during plastic deformation. The dislocation density and misorientation is then used as input data for the recrystallization model. Grain boundary migration (GBM) is modeled by using a kinetic law which links the velocity of the grain boundaries, described by LS functions, with the thermodynamic driving pressures. The nucleation of new grains is modeled by using phenomenological laws, which define the number of nucleation sites as a function of the dislocation density and the misorientation. The link between the CPFEM and the GBM model gives an accurate description of the DRX phenomenon, which is intended to model industrial processes. In this work the methods and the coupling algorithm are presented, along with an analysis of the different numerical parameters and strategies to define nucleation. The calibration and validation of the model against experimental data for 304L steel will be presented in a future work.

中文翻译：

---

CPFEM 环境下动态再结晶全场建模的新数值框架

摘要 这项工作描述了基于水平集 (LS) 的微观结构演化建模数值框架与晶体塑性有限元方法 (CPFEM) 的耦合，以提出一种专用于动态再结晶 (DRX) 建模的新全场方法。这些开发用于在高温下经受大变形的 3D 多晶金属。CPFEM 是模拟塑性变形过程中位错密度和取向差演化的最佳替代方法之一。然后将位错密度和取向差用作再结晶模型的输入数据。晶界迁移 (GBM) 是通过使用动力学定律建模的，该定律将晶界速度（由 LS 函数描述）与热力学驱动压力联系起来。新晶粒的成核通过使用现象学定律进行建模，这些定律将成核位点的数量定义为位错密度和取向错误的函数。CPFEM 和 GBM 模型之间的联系准确描述了 DRX 现象，旨在模拟工业过程。在这项工作中，介绍了方法和耦合算法，并分析了定义成核的不同数值参数和策略。将在未来的工作中介绍针对 304L 钢的实验数据对模型进行校准和验证。CPFEM 和 GBM 模型之间的联系准确描述了 DRX 现象，旨在模拟工业过程。在这项工作中，介绍了方法和耦合算法，并分析了定义成核的不同数值参数和策略。将在未来的工作中介绍针对 304L 钢的实验数据对模型进行校准和验证。CPFEM 和 GBM 模型之间的联系准确描述了 DRX 现象，旨在模拟工业过程。在这项工作中，介绍了方法和耦合算法，并分析了定义成核的不同数值参数和策略。将在未来的工作中介绍针对 304L 钢的实验数据对模型进行校准和验证。