High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium
Abstract
:1. Introduction
2. Materials and Experimental Procedures
3. Results and Discussion
3.1. Effects of Temperature and Deformation Rate on the Microstructural Evolution
3.2. Constitutive Equation for the Modified Johnson-Cook Model
3.3. Calculation of B(T), n(T) and C(ε,T)
Material Constants | 600 °C | 700 °C | 800 °C | 900 °C |
---|---|---|---|---|
B(T), MPa | −60.099 | −11.806 | −1.696 | −1.995 |
n(T) | 4.311 | 3.251 | 1.319 | 0.123 |
Strain | 600 °C | 700 °C | 800 °C | 900 °C |
---|---|---|---|---|
0.20 | −0.0201 | −0.013 | 0.0005 | −0.013 |
0.40 | 0.0055 | −0.0005 | 0.0016 | −0.0005 |
0.60 | 0.015 | −0.0162 | −0.0019 | −0.0162 |
0.80 | −0.0029 | −0.0265 | −0.0035 | −0.0265 |
3.4. Prediction of Flow Stress by the Modified Johnson-Cook Modeling
3.5. Extension of the Johnson-Cook Model for Prediction of ECAE Processed Ti with a Corrective Term
3.6. Verification of the Model
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sajadifar, S.V.; Yapici, G.G. High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium. Metals 2015, 5, 1315-1327. https://doi.org/10.3390/met5031315
Sajadifar SV, Yapici GG. High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium. Metals. 2015; 5(3):1315-1327. https://doi.org/10.3390/met5031315
Chicago/Turabian StyleSajadifar, Seyed Vahid, and Guney Guven Yapici. 2015. "High Temperature Flow Response Modeling of Ultra-Fine Grained Titanium" Metals 5, no. 3: 1315-1327. https://doi.org/10.3390/met5031315