Research on the Dynamic Compressive Deformation Behavior of 3D-Printed Ti6Al4V
Abstract
:1. Introduction
2. Materials and Test Methods
2.1. Materials
2.2. Test Method
3. Test Results and Discussion
3.1. Stress–Strain Relationship
3.2. Effect of Strain Rate on Strength
3.3. Effect of Temperature on Strength
3.4. Fracture Behavior
3.5. Constitutive Relations
3.6. Plastic Deformation Behavior under Extreme Conditions
4. Conclusions
- The TC-4 alloy prepared via 3D printing had higher strength than the traditional TC-4 alloy. However, the 3D-printed TC-4 alloy was more prone to adiabatic shear fracture under dynamic compressive deformation conditions.
- The TC-4 alloy prepared via 3D-printing technology exhibited certain differences in material properties in different printing directions. The material sampled longitudinally along the printing direction under static conditions had higher strength than the material sampled transversely, but the difference was smaller under dynamic deformation conditions.
- The established modified J-C constitutive model could effectively describe the stress–strain relationship of the AM-P-TC-4 material under dynamic compressive deformation.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Material | Composition (wt.%) | ||||
---|---|---|---|---|---|
Al | V | O | Fe | Ti | |
TC-4 | 6.30 | 4.10 | <0.14 | <0.14 | Balance |
AM-TC-4 | 6.13 | 4.00 | <0.15 | <0.25 | Balance |
Parameter | Values |
---|---|
Laser Power | 340 W |
Scan Speed | 1250 mm/s |
Layer Thickness | 60 μm |
Description | Notations | Values | |
---|---|---|---|
TC-4 | AM-P-TC-4 | ||
Density | ρ (g/cm3) | 4.459 | 4.120 |
Yield stress constant | A (Mpa) | 1357.2 | 1480.3 |
Strain hardening constant | B (Mpa) | 303.15 | 480.3 |
- | n | 0.686 | 0.465 |
Strain rate hardening constant | C1 | 0.0519 | 0.0217 |
Strain rate hardening constant | C2 | 0.0116 | 0.018 |
Thermal softening constant | m | 1.17 | 1.15 |
Reference strain rate | (s−1) | 1500 | 1200 |
Melting temperature | Tm (K) | 2110 | 2110 |
Reference temperature | Tr (K) | 289 | 289 |
Liner | Time (μs) | Jet Pattern |
---|---|---|
TC-4 | 40 | |
60 | ||
AM-P-TC-4 | 40 | |
60 |
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Pu, B.; Li, W.; Zhang, Q.; Zheng, Y.; Wang, X. Research on the Dynamic Compressive Deformation Behavior of 3D-Printed Ti6Al4V. Metals 2021, 11, 1327. https://doi.org/10.3390/met11081327
Pu B, Li W, Zhang Q, Zheng Y, Wang X. Research on the Dynamic Compressive Deformation Behavior of 3D-Printed Ti6Al4V. Metals. 2021; 11(8):1327. https://doi.org/10.3390/met11081327
Chicago/Turabian StylePu, Bo, Wenbin Li, Qing Zhang, Yu Zheng, and Xiaoming Wang. 2021. "Research on the Dynamic Compressive Deformation Behavior of 3D-Printed Ti6Al4V" Metals 11, no. 8: 1327. https://doi.org/10.3390/met11081327