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Prediction of dynamic globularization of Ti-17 titanium alloy with initial lamellar microstructure during hot compression

机译：热压缩过程中具有初始层状微结构的Ti-17钛合金动态球化的预测

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摘要

Isothermal compression experiments were conducted on Ti-17 titanium alloy with initial lamellar microstructure. The fractions of dynamic globularization of the microstructure under various conditions of strain, strain rate and temperature were obtained by quantitative metallographic analysis. On the basis of these data, the prediction model for describing the non-linear relationship between the dynamic globularization fraction and the deformation strain, strain rate and temperature of Ti-17 alloy was developed with a back-propagation artificial neural network (ANN) method. This model was incorporated into rigid-viscoplastic thermo-coupled finite element method (FEM). The large-size cylinder compression of Ti-17 alloy was simulated and corresponding experimental research was performed, to verify the reliability and accuracy of the integration of FEM and ANN model. The well coincidence of the predicted results with measured ones showed that the model was able to reasonably predict the fractions of dynamic globularization of Ti-17 alloy with initial lamellar microstructure during hot deformation procedure.
机译：对具有初始层状微结构的Ti-17钛合金进行了等温压缩实验。通过定量金相分析获得了在各种应变，应变速率和温度条件下微观结构的动态球化分数。在这些数据的基础上，利用反向传播人工神经网络（ANN）方法建立了描述动态球化率与Ti-17合金变形应变，应变速率和温度之间非线性关系的预测模型。 。该模型已被纳入刚性粘塑性热耦合有限元方法（FEM）。模拟了Ti-17合金的大缸压缩，并进行了相应的实验研究，验证了有限元法和人工神经网络模型集成的可靠性和准确性。预测结果与实测结果的良好吻合表明，该模型能够合理地预测热变形过程中具有初始层状微结构的Ti-17合金的动态球化分数。

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  • 来源
    《Materials Science and Engineering》 |2010年第23期|p.6193-6199|共7页
  • 作者

    Kai-xuan Wang; Wei-dong Zeng; Yong-qing Zhao; Yi-tao Shao; Yi-gang Zhou;

  • 作者单位

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;

    rnState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;

    Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China;

    rnState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;

    rnState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China;

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  • 正文语种 eng
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  • 关键词

    Ti-17 titanium alloy; dynamic globularization; artificial neural network; finite element method;

    机译：Ti-17钛合金;动态球化人工神经网络;有限元法;

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