Study on Hypervelocity Impact Characteristics of Ti/Al/Mg Density-Graded Materials
Abstract
:1. Introduction
2. Material and Experimental Procedure
2.1. Material Preparation
2.2. Hypervelocity Impact Testing
2.3. Analysis and Testing
3. Microstructure of Ti/Al/Mg Density-Graded Materials
4. The Impact Characteristics of Ti/Al/Mg Density-Graded Materials
4.1. Macro Damage Characteristics
4.2. Micro Damage Characteristics
4.3. Protection Mechanism
5. Conclusions
- (1)
- The impact crater of sample I was a reverse petal-shaped failure morphology showing typical characteristics of ductile materials. Sample II was collapsed directly by shock waves, and the crater was a regular circle. The Al/Mg interface of sample I was completely delaminated, while those of sample II were well bonded and exhibited significant mechanical synergetic response.
- (2)
- A theoretical analysis was performed to explore the mechanism of protection and the propagation process of shock wave. Compared with aluminum bumper, the hypervelocity impact characteristics of Ti/Al/Mg density-graded shields showed a smaller largest central fragment of the debris cloud and a wider expanded area of projectile fragments. The results showed that the unique wave impedance gradient characteristics of Ti/Al/Mg density-graded shields could regulate the propagation path of the shock wave and increase the sustaining period, so the higher degrees of fragmentation achieved, which was beneficial to convert more projectile kinetic energy into the internal energy.
- (3)
- It demonstrated the potential applications of Ti/Al/Mg density-graded materials in the orbital debris shields. The further research focused on the control of interface bonding strength and matrix strength should be performed.
Author Contributions
Funding
Conflicts of Interest
References
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Materials | Density (g/cm3) | C0 (km/s) | S | Melting Temperature (°C) | Vaporization Temperature (°C) |
---|---|---|---|---|---|
TC4 | 4.419 | 5.130 | 1.028 | 1800 | 3000 |
2A12 | 2.785 | 5.328 | 1.338 | 660 | 2057 |
AZ31 | 1.78 | 4.516 | 1.256 | 651 | 1107 |
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Long, L.; Peng, Y.; Zhou, W.; Liu, W. Study on Hypervelocity Impact Characteristics of Ti/Al/Mg Density-Graded Materials. Metals 2020, 10, 697. https://doi.org/10.3390/met10050697
Long L, Peng Y, Zhou W, Liu W. Study on Hypervelocity Impact Characteristics of Ti/Al/Mg Density-Graded Materials. Metals. 2020; 10(5):697. https://doi.org/10.3390/met10050697
Chicago/Turabian StyleLong, Luping, Yingbiao Peng, Wei Zhou, and Wensheng Liu. 2020. "Study on Hypervelocity Impact Characteristics of Ti/Al/Mg Density-Graded Materials" Metals 10, no. 5: 697. https://doi.org/10.3390/met10050697