Abstract
The α + β → β phase transformation kinetics of Ti-1300 alloy during continuous heating at different heating rates were investigated using dilatometric method. Results show that the curves of the α + β → β phase transformation exhibit a typical S-shaped pattern, which indicates that the α + β → β phase transformation is a nucleation-growth-controlled process. The overall activation energy of the α + β → β transformation of the alloy is 797 kJ·mol−1. The nucleation and growth mechanism of the α + β → β transformation was also investigated using the non-isothermal Avrami exponent. The Avrami exponent during α + β → β transformation process significantly changes with transformed volume fraction increasing, which indicates that the α + β → β transformation mechanism in the Ti-1300 alloy varies at different sections.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (No. 51401058), the Transformation Project of Major Scientific and Technological Achievements of Shanxi Province (No. 2012KTCG04-14), and the Science and Technology Innovation Team Project of Shanxi Province of China (No. 2012KCT-23).
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Wan, MP., Zhao, YQ. & Zeng, WD. Phase transformation kinetics of Ti-1300 alloy during continuous heating. Rare Met. 34, 233–238 (2015). https://doi.org/10.1007/s12598-015-0472-y
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DOI: https://doi.org/10.1007/s12598-015-0472-y