(1. 西北工业大学 材料学院, 西安 710072;
2. 中国人民解放军驻沈阳飞机工业(集团)有限公司, 沈阳 100034)
摘 要: 通过引入一个与微观组织相关的函数对稳态流动应力模型进行修正， 建立了金属材料高温变形时的稳态流动应力模型。 并将该耦合微观组织参数的流动应力模型写入有限元程序中， 模拟了TC6合金叶片在等温锻造过程中初生α相晶粒尺寸的变化。 研究了变形工艺参数(压下量， 变形温度， 变形速度和摩擦因子)对零件内部初生α相晶粒尺寸的影响。
关键字: 叶片； 等温锻造； 晶粒尺寸； 数值模拟
（1. School of Materials Science and Engineering,
Northwestern Polytechnical University, Xi'an 710072,China;
2. Shenyang Aircraft Industries (Group) Co., Ltd.,
Shenyang 100034, China）
Abstract: A constitutive equation to describe a correlation of the deformation behavior with the microstructure evolution of the TC6 alloy during high temperature deformation was proposed, through introducing a function related to the microstructure variables. Combining FEM and the present equation and model for microstructure evolution, the grain size of prior α phase was simulated during the isothermal forging of TC6 alloy airfoil blade using commercial FE software. The present results illustrate the α phase grain size during the forging of TC6 alloy airfoil blade in detail. The simulated results show that the height reduction, deformation temperature and strain rate have more significant effects on the grain size of prior α phase than the friction factor between the billet and the die.
Key words: airfoil blade; isothermal forging; grain size; numerical simulation
