Fe-Al-V三元系富铁角热力学优化  

Thermodynamic Optimization of Fe-Rich Corner in Fe-Al-V Ternary System

作　　者：吴通 刘璇 郑伟森[1] 何燕霖[1] WU Tong;LIU Xuan;ZHENG Weisen;HE Yanin(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444

出　　处：《上海金属》2024年第2期89-94,共6页Shanghai Metals

基　　金：国家自然科学基金(51901124)。

摘　　要：采用CALPHAD方法对Fe-Al-V三元系富铁角进行热力学优化,并首次提出采用三亚点阵模型描述三元金属间化合物L21相,即(Fe)2(Al,Fe)1(Fe,V)1。基于可靠的边界二元系热力学描述,结合Fe-Al-V三元系富铁角试验数据,通过优化获得了一套自洽准确的热力学模型参数。优化的模型参数可较满意地重现Fe-Al-V三元系富铁角的相平衡关系,弥补了商业数据库无法对其进行描述的不足,为钒微合金化轻质钢的设计开发提供可靠的理论基础。Fe-rich corner in the Fe-Al-V ternary system was thermodynamically optimized by the CALPHAD method,it was proposed firstly that the ternary intermetallic compound L21,i.e.,(Fe)2(Al,Fe)1(Fe,V)1,was described by a three-sublattice model.Based on the reliable thermodynamic descriptions of the boundary binary systems,and combined with the experimental data of Fe-rich corner in the Fe-Al-V ternary system,a set of self-consistent and reliable thermodynamic parameters was obtained by optimization.The optimized model parameters could more satisfactorily reproduce the phase equilibria at the Fe-rich corner in the Fe-Al-V system,making up for shortcoming that commercial databases cannot describe it,and providing a reliable theoretical basis for the design and development of vanadium-microalloyed lightweight steel.

关 键 词：Fe-Al-V 计算热力学 等温截面 CALPHAD方法 

分 类 号：TG142.1[一般工业技术—材料科学与工程]