铸造技术2025，Vol.46Issue(11)：1048-1057,10.DOI:10.16410/j.issn1000-8365.2025.5108
强磁场下M-B(M=Fe,Co,Ni)多元共晶合金的非平衡凝固组织调控
Controlling the Non-equilibrium Solidification Microstructure of M-B(M=Fe,Co,Ni)Eutectic Multi-principal Element Alloy under a High Magnetic Field
摘要
Abstract
Eutectic multi-principal element alloys combine the good workability of eutectic alloys with the excellent comprehensive properties caused by the high-entropy effects of multi-principal element alloys.By coupling various microstructure regulation methods,more diverse microstructural characteristics are expected to be exhibited,and its performance potential can be further explored.On the basis of this,static magnetic field and deep undercooling technology were combined to systematically investigate the non-equilibrium solidification behavior and microstructural evolution law of the FeCoNiB0.65 alloy.The results demonstrate that with increasing undercooling,the primary structure undergoes a morphological transition from α-M dendrites to seaweed-like eutectic dendrites,and the two phases inside the seaweed transition from α-M/M23B6 to α-M/M3B.The alloy matrix frequently experiences competitive formation between the M23B6 phase and the M3B phase,which is related to the critical nucleation barrier that needs to be overcome during solidification.The coexistence of two phases in the matrix at ΔT=60 K is related to the solid-state phase transition from incomplete decomposition of the M23B6 phase to the M3B phase.Both the M23B6 and α-M phases have FCC crystal structures and exhibit significant coupled growth characteristics,forming a cube-cube orientation relationship during solidification.关键词
共晶多主元合金/强静磁场/非平衡凝固/cube-cube取向关系/海藻形貌Key words
eutectic multi-principal element alloy/high static magnetic field/nonequilibrium solidification/cube-cube orientation relationship/seaweed morphology分类
金属材料引用本文复制引用
马嘉浩,卜凡,邢晨旭,李夏荷,刘恬睿,王嘉琨,贺一轩..强磁场下M-B(M=Fe,Co,Ni)多元共晶合金的非平衡凝固组织调控[J].铸造技术,2025,46(11):1048-1057,10.基金项目
凝固技术全国重点实验室基金(2024-ZD-02,2024-BJ-02) （2024-ZD-02,2024-BJ-02）
国家自然科学基金(52104386) （52104386）
