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首页> 外文期刊>Journal of Materials Engineering and Performance >Development of the Dynamic Globularization Prediction Model for Ti-17 Titanium Alloy Using Finite Element Method
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Development of the Dynamic Globularization Prediction Model for Ti-17 Titanium Alloy Using Finite Element Method

机译：有限元法建立Ti-17钛合金动态球化预测模型

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摘要

In this work, a finite element method (FEM) model for predicting dynamic globularization of Ti-17 titanium alloy is established. For obtaining the microstructure evolution during dynamic globularization under varying processing parameters, isothermal hot compression tests and quantitative metallographic analysis were conducted on Ti-17 titanium alloy with initial lamellar microstructure. The prediction model, which quantitatively described the non-linear relationship between the dynamic globularization fraction and the deformation strain, temperature, and strain rate, was developed on the basis of the Avrami equation. Then the developed model was incorporated into DEFORM software as a user subroutine. Finally, the large-sized step-shaped workpiece was isothermally forged and corresponding FEM simulation was conducted to verify the reliability and accuracy of the integrated FEM model. The reasonable coincidence of the predicted results with experimental ones indicated that the established FEM model provides an easy and a practical method to predict dynamic globularization for Ti-17 titanium alloy with complex shape.
机译：在这项工作中，建立了预测Ti-17钛合金动态球化的有限元方法（FEM）模型。为了获得在不同工艺参数下动态球化过程中的显微组织演变，对具有初始层状显微组织的Ti-17钛合金进行了等温热压缩试验和定量金相分析。基于Avrami方程，建立了预测模型，该模型定量描述了动态球化率与变形应变，温度和应变速率之间的非线性关系。然后，将开发的模型作为用户子例程并入DEFORM软件。最后，对大型阶梯状工件进行了等温锻造，并进行了相应的有限元模拟，以验证集成有限元模型的可靠性和准确性。预测结果与实验结果的合理吻合表明，所建立的有限元模型为复杂形状的Ti-17钛合金的动态球化提供了简便而实用的方法。

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