Development of the Dynamic Globularization Prediction Model for Ti-17 Titanium Alloy Using Finite Element Method

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• 作者：Zhiqiang Jia (1)
  Weidong Zeng (1)
  Jianwei Xu (1)
  Jianhua Zhou (2)
  Xiaoying Wang (2)
  
  1. State Key Laboratory of Solidification Processing ; Northwestern Polytechnical University ; No. 127 Youyi Xilu ; Xi鈥檃n ; 710072 ; China
  2. Baoshan Iron & Steel Co. ; Ltd. ; Shanghai ; 200940 ; China
  
• 关键词：dynamic globularization ; finite element method ; prediction model ; Ti ; 17 titanium alloy
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：24
• 期：4
• 页码：1771-1780
• 全文大小：2,916 KB
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  2. Wang, KX, Zeng, WD, Zhao, YQ, Lai, YJ, Zhou, YG (2010) Hot Working of Ti-17 Titanium Alloy with Lamellar Starting Structure Using 3-D Processing Maps. J. Mater. Sci. 45: pp. 5883-5891 CrossRef
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Characterization and Evaluation Materials
  Materials Science
  Tribology, Corrosion and Coatings
  Quality Control, Reliability, Safety and Risk
  Engineering Design
  
• 出版者：Springer New York
• ISSN：1544-1024

文摘

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.