Au-Pt合金凝固-固态相变微观组织演化相场法模拟  

Phase Field Modeling of Microstructure Evolution During Solidification and Subsequent Solid-State Phase Transformation of Au-Pt Alloys

作　　者：余东 马威龙 王亚莉 王锦程[1] YU Dong;MA Weilong;WANG Yali;WANG Jincheng(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China;College of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072 [2]西安理工大学材料科学与工程学院,西安710048

出　　处：《金属学报》2025年第1期109-116,共8页Acta Metallurgica Sinica

基　　金：国家重点研发计划项目No.2021YFC2202301。

摘　　要：凝固/固态相变过程中的微观组织演化对材料的组织控制及性能优化具有重要意义,如何实现凝固-固态相变微观组织演化的全流程一体化数值模拟是当前材料微观组织模拟领域的前沿课题。本工作以Au-Pt合金为例,基于多相场模型和微观组织信息传递算法,研究了不同初始成分条件下凝固和固态相变过程微观组织的演化规律。实现了凝固-固态相变微观组织演化全流程一体化预测,揭示了凝固过程中微观偏析和晶界对后续脱溶析出和调幅分解过程的影响机制。The evolution of the microstructure during solidification and solid-state phase transformation is crucial for controlling the material microstructure and optimizing performance.Achieving an integrated numerical simulation of the microstructural evolution from solidification to solid-state phase transformation is a cutting-edge challenge in material-microstructure simulation.This study focuses on Au-Pt alloys,utilizing a multiphase field model combined with a microstructural information transfer algorithm to simulate and predict microstructural evolution during the solidification and solid-state phase transformation under different initial composition conditions.The study successfully realizes an integrated simulation prediction of the microstructural evolution across both processes,revealing the influence of microsegregation and grain boundaries during solidification on subsequent processes of decomposition and spinodal decomposition.

关 键 词：凝固 固态相变 微观组织演化 相场法 一体化数值模拟 

分 类 号：TG111.4[金属学及工艺—物理冶金]