铸造技术2025，Vol.46Issue(4)：371-376,6.DOI:10.16410/j.issn1000-8365.2025.4264
三元合金的平界面形态稳定性分析
Study on the Morphological Stability of the Planar Solid-Liquid Interface of a Ternary Alloy
摘要
Abstract
The morphological linear stability and nonlinear stability of the solid-liquid interface of an Al-0.3 wt.％Si-0.1 wt.％Cu ternary alloy were investigated via thermodynamics methods.Typical parameters of the phase diagram and different stable regions between the linear stability and nonlinear stability of the solid-liquid interface were discussed via two parameters,which were calculated via the thermodynamic method and the linear parameter method,respectively.The stable regions,unstable regions,and subcritical bifurcation regions of the solid-liquid interface are also presented.The results reveal that the typical parameters of the phase diagram obtained via thermodynamic calculations vary with temperature rather than being linear parameters with constant values.The stable regions calculated by coupling with the thermodynamic method are less than those calculated by linear parameters under the conditions of either linear stability or nonlinear stability theory,and the judgment of solid-liquid interface instability is more stringent.When the perturbation frequency is large enough or small enough,the parameters obtained via thermodynamic calculation and linearized parameters can be substituted for each other,with little impact on the final judgment of solid-liquid interface stability.关键词
热力学计算技术/三元合金/相图特征参数/固/液界面稳定性Key words
thermodynamics method/ternary alloy/phase diagram typical parameters/morphological stability分类
金属材料引用本文复制引用
刘少军,张宏基,李江江,曹金玲,何坛,罗海军,李鹏飞..三元合金的平界面形态稳定性分析[J].铸造技术,2025,46(4):371-376,6.基金项目
榆林学院高层次人才科研启动基金(XJ2024000303) （XJ2024000303）
陕西省科技厅社发项目(2023-YBSF-540) （2023-YBSF-540）
