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Coarsening Kinetics and Morphological Evolution in a Two-Phase Titanium Alloy During Heat Treatment

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Abstract

The effects of alpha/beta heat treatment on microstructure evolution of Ti-17 alloy with a lamellar colony structure are established. Heat treatment experiments are conducted at 1103 or 1063 K for times ranging from 10 min to 8 h. The main features of microstructure evolution during heat treatment comprise static globularization and coarsening of primary alpha phase. Such behaviors can be accelerated by higher heat treatment temperature. Furthermore, globularization and coarsening behaviors show a faster rate at higher prestrain. In order to better understand the microstructure evolution of Ti-17 alloy during alpha/beta heat treatment, static globularization and coarsening behaviors are modeled in the theoretical frame of the Johnson-Mehl-Avarmi-Kolmogorov (JMAK) and Lifshitz-Slyozov-Wagner (LSW) theories, respectively. The JMAK and LSW kinetics parameters are derived under different experimental conditions. Agreements between measurements and predictions are found, indicating that the JMAK and LSW theories can be used to predict and trace static globularization and coarsening processes of Ti-17 alloy during alpha/beta heat treatment.

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Acknowledgments

The authors thank the financial supports from the Research Fund for the Doctoral Program of Higher Education of China (20136102110034) and the Program for New Century Excellent Talents in University (NCET-07-0696).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Jianwei Xu, Weidong Zeng, Zhiqiang Jia, Xin Sun & Yawei Zhao

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  1. Jianwei Xu
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  2. Weidong Zeng
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  3. Zhiqiang Jia
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  4. Xin Sun
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  5. Yawei Zhao
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Correspondence to Weidong Zeng.

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Xu, J., Zeng, W., Jia, Z. et al. Coarsening Kinetics and Morphological Evolution in a Two-Phase Titanium Alloy During Heat Treatment. J. of Materi Eng and Perform 25, 734–743 (2016). https://doi.org/10.1007/s11665-016-1951-5

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  • DOI: https://doi.org/10.1007/s11665-016-1951-5

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