基于多场耦合分析的TC4叶片精锻成形的微观组织模拟

Microstructure simulation of TC4 blade precision forging process based on multiple field coupling analysis

针对TC4钛合金叶片精锻过程,运用三维刚粘塑性有限元模拟方法,采用能反映微观组织演变对材料流动应力影响的本构关系和Yada形式的微观组织预测模型,实现了TC4叶片精锻过程的有限元变形-传热-微观组织演变耦合分析,模拟预测了叶片精锻成形的微观组织,获得了叶片精锻成形的晶粒尺寸和体积分数的分布规律,并分析了变形温度对晶粒尺寸和体积分数的影响,为合理确定叶片精锻工艺和控制叶片质量提供了一定的依据。

Based on 3D rigid-viscous-plastic FEM simulation, a coupling analysis of deformation-heat transfer-structure evolution during TCA blade precision forging process is carried out, employing with constitutive equation presenting microstructure evolution influence on materials flow stress and Yada prediction model of microstructure evolution. Thus microstructure of the blade precision forging process is predicted numerically, distribution laws of grain size and volume fraction are revealed, and influence of deformation temperature on grain size and volume fraction is also discussed. The results may help to the reasonable determination of blade forging process and control of blade quality.