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- Title
High-temperature deformation behavior of a beta Ti-3.0Al-3.5Cr-2.0Fe-0.1B alloy.
- Authors
Qu, Wen-Tao; Sun, Xu-Guang; Hui, Song-Xiao; Wang, Zhen-Guo; Li, Yan
- Abstract
The high-temperature deformation behavior of a beta Ti-3.0Al-3.5Cr-2.0Fe-0.1B alloy was investigated by a Gleeble-1500D thermal simulator. The height reduction was 50%, corresponding to a true strain of 0.693. The strain rate ranging from 0.01 to 10.00 s−1 and the deformation temperature ranging from 800 to 950 °C were considered. The flow stress and the apparent activation energy for deformation, along with the constitutive equation, were used to analyze the behavior of the Ti-3.0Al-3.5Cr-2.0Fe-0.1B alloy. The processing map was established. The effect of strain rate on the microstructure at 850 °C was evaluated. The flow stress-strain curves indicated that the peak flow stresses increased along with an increase in the strain rate and decreased as the deformation temperature increased. Based on the true stress-true strain curves, the constitutive equation was established and followed as the ε˙=6.58×1010sinh0.0113σ3.44exp-245481.3/RT<inline-graphic></inline-graphic>. The processing map exhibited the “unsafe” region at the strain rate of 10 s−1 and the temperature of 850 °C, and the rest region was “safe”. The deformation microstructure demonstrated that both dynamic recovery (DRV) and dynamic recrystallization (DRX) existed during deformation. At the lower strain rate of 0.01 s−1, the main deformation mechanism was the DRV, and the DRX was the dominant deformation mechanism at the higher strain rate of 1.00 s−1.
- Publication
Rare Metals, 2018, Vol 37, Issue 3, p217
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-018-0999-9