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Study on the Hot Processing Parameters-Impact Toughness Correlation of Ti-6Al-4V Alloy

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Abstract

In this research, the hot processing parameters-impact toughness correlation of Ti-6Al-4V titanium alloy is studied. Fifty-four groups of hot processing treatments with different forging temperatures (930, 950, 970 °C), deformation degrees (20, 50, 80%), annealing temperatures (600, 700, 800 °C), and annealing time (1 and 5 h) were conducted. The orthogonal design was used to find the primary hot processing parameters influencing the impact toughness of Ti-6Al-4V alloy. The results show that the annealing temperature can exert the biggest influence on impact toughness. Low annealing temperature is essential to achieve high impact toughness value. In addition, the BP neural network was used to describe the quantitative correlation between hot processing parameters and impact toughness. The results show that the BP neural network exhibits good performance in predicting the impact toughness of Ti-6Al-4V alloy. The prediction error is within 5%. The BP neural network and the orthogonal design method are mutually confirmed in the present work. Finally, based on the microstructure analysis, the reasons responsible for above experimental results are explained.

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Acknowledgment

This work was financially supported by Research Fund for the Doctoral Program of Higher Education of China with No. 20116102110015, the New Century Excellent Talents in University with No. NCET-07-0696, and the National 973 Project of China with No. 2007CB613807.

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, No.127 Youyi Xilu, Xi’an, 710072, People’s Republic of China

    Xiaohui Shi, Weidong Zeng, Yu Sun & Yuanfei Han

  2. Northwest Institute for Non-ferrous Metal Research, Xi’an, 710016, People’s Republic of China

    Yongqing Zhao

Authors
  1. Xiaohui Shi
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  2. Weidong Zeng
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  3. Yu Sun
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  4. Yuanfei Han
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Correspondence to Weidong Zeng.

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Shi, X., Zeng, W., Sun, Y. et al. Study on the Hot Processing Parameters-Impact Toughness Correlation of Ti-6Al-4V Alloy. J. of Materi Eng and Perform 25, 1741–1748 (2016). https://doi.org/10.1007/s11665-016-2050-3

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  • DOI: https://doi.org/10.1007/s11665-016-2050-3

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