随加工工艺趋于复杂化和极端化, 基于热力学驱动力和动力学能垒相对独立的枝晶生长理论已无法精确描述多种机制共同作用的非平衡凝固过程, 大大 限制了该理论与工业应用的结合。首先, 本文综述基于热-动力学相对独立的枝晶生长理论的发展, 分析其内涵的本征热-动力学相关性, 并集成于以双辊薄带 连铸技术为背景的基于热-动力学相关性的枝晶生长模型。其次, 定量证明了热力学驱动力和动力学能垒的相关性, 通过选择不同的驱动力-能垒组合, 试图在 双辊薄带连铸技术中实现合金设计和工艺优化。最后, 通过分析现有模型的不足, 对进一步枝晶生长模型的发展以及与工艺的结合进行展望。

In the complicated and extreme hot-processing technology, the classical theories of dendrite growth based on the relative independency between thermodynamics and kinetics cannot be adapted to deal with the versatile mechanisms involved in complicated non-equilibrium solidifications, thus drastically limiting their industrial applications. This review summarized the development of dendrite growth theories assuming the thermo-kinetic independence, analyzed the inherent thermo-kinetic correlation, and described concisely the model for twin-roll casting technology and assuming the thermo-kinetic correlation. Applying above model, the correlation between thermodynamic driving force and kinetic energy barrier was quantitatively proved, and the alloy design and processing optimization in the twin-roll casting technology can be realized by selecting different thermo-kinetic combinations. Through declaring the shortcomings of the existing models, it is promising to generalize the further development of dendrite growth models and the application in realistic processing.