Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. True Stress-True Strain Curves
3.2. Processing Map
3.3. Microstructure
3.3.1. Samples Deformed in Flow Stability Regions
3.3.2. Samples Deformed in Flow Instability Regions
4. Conclusions
- The flow stress variation of Ti-4Al-1Sn-2Zr-5Mo-8V-2.5Cr alloy is strongly dependent on the strain rate and deformation temperature. The peak flow stress decreases with decreasing strain rate and increasing temperature.
- The constitutive equation is constructed and the average deformation activation energy is calculated to be 592.7 kJ/mol. The constitutive equations for the current alloy are:
- The dominant mechanism in the instability domain is the flow localizations, while in the stability domains, the mechanisms are DRV and DRX. The optimal processing parameters are obtained in the temperature range of 780 °C to 880 °C and strain rate of 0.001 to 0.01s−1.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Element | Al | Sn | Zr | Mo | V | Cr | Ti |
---|---|---|---|---|---|---|---|
Nominal wt. % | 4.00 | 1.00 | 2.00 | 5.00 | 8.00 | 2.50 | bal. |
Actual wt. % | 4.30 | 1.03 | 2.07 | 4.99 | 8.00 | 2.50 | bal. |
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Wu, J.; Lü, Z.; Zhang, C.; Han, J.; Zhang, H.; Zhang, S.; Hayat, M.; Cao, P. Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression. Metals 2017, 7, 498. https://doi.org/10.3390/met7110498
Wu J, Lü Z, Zhang C, Han J, Zhang H, Zhang S, Hayat M, Cao P. Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression. Metals. 2017; 7(11):498. https://doi.org/10.3390/met7110498
Chicago/Turabian StyleWu, Jie, Zhidan Lü, Changjiang Zhang, Jianchao Han, Hongzhou Zhang, Shuzhi Zhang, Muhammad Hayat, and Peng Cao. 2017. "Investigation of the Deformation Mechanism of a near β Titanium Alloy through Isothermal Compression" Metals 7, no. 11: 498. https://doi.org/10.3390/met7110498