航空材料学报2025，Vol.45Issue(5)：44-60,17.DOI:10.11868/j.issn.1005-5053.2025.000096
镍基高温合金定向凝固过程数值模拟研究进展
Research progress on numerical simulation of directional solidification process for nickel-based superalloy
摘要
Abstract
Optimizing the directional solidification process of nickel-based superalloys is pivotal for enhancing the quality of hot-end castings in aero-engines.Traditional process optimization methods have heavily relied on empirical trial-and-error approaches,whereas numerical simulation technology is increasingly emerging as a pivotal tool.This paper presents a comprehensive review of the latest advancements in numerical simulation pertaining to the directional solidification process of nickel-based superalloys.It emphasizes modeling methodologies,simulation outcomes,and their practical applications in process optimization and defect control(such as stray grains and freckles)across various multi-physics fields,encompassing temperature fields,fluid flow and solute transport,stress-strain fields,and microstructural aspects(grains and dendrites).A synthesis of current research reveals that numerical simulation studies still grapple with several shortcomings:a high degree of dependence on approximate boundary conditions in models;inadequate refinement and limited global optimization capabilities within process windows;incomplete numerical representations of certain crystalline defects and complex defect interactions;and substantial computational resource demands for high-fidelity microstructural simulations.To tackle these challenges,future research trends are anticipated to concentrate on deepening and integrating multi-physics and cross-scale coupling models,leveraging artificial intelligence-driven simulation and optimization,enhancing the precise characterization of solidification mechanisms in multi-component alloys,and strengthening experimental-simulation collaborative validation systems through the integration of in-situ characterization techniques with simulations.By advancing in these areas,numerical simulation technology is poised to play a pivotal role in achieving precise control over the morphology and properties of complex castings,while effectively mitigating defects.关键词
高温合金/数值模拟/定向凝固/工艺优化/多物理场/微观组织Key words
nickel-based superalloys/numerical simulation/directional solidification/process optimization/multi-physics fields/microstructure分类
航空航天引用本文复制引用
吴雨萌,姚志浩,佟海滨,丁方政,张迈,于国瀚,李远,王尧,张剑,赵云松..镍基高温合金定向凝固过程数值模拟研究进展[J].航空材料学报,2025,45(5):44-60,17.基金项目
重点研发计划青年科学家项目(2022YFB3708100) （2022YFB3708100）
