Mechanical response and mechanisms of titanium foam with different porosities under static and impact loading
This study focuses on the differences in static and impact compression properties of titanium foams with 45 %–65 % porosity. Experimental results reveal that as porosity increases, the static compressive strength of titanium foams gradually decreases, while the dynamic compressive strength under hig...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425014437 |
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| Summary: | This study focuses on the differences in static and impact compression properties of titanium foams with 45 %–65 % porosity. Experimental results reveal that as porosity increases, the static compressive strength of titanium foams gradually decreases, while the dynamic compressive strength under high strain rates (1000–4000 s−1) exhibits a significant strain-rate strengthening phenomenon within a specific porosity range. Energy absorption analysis demonstrates that titanium foam with 55 % porosity achieves the optimal specific energy absorption capacity (19.06 J/g) under impact compression. The observed variations in static/impact energy absorption performance across different porosity levels provide critical insights for optimizing the mechanical properties of titanium foams. Microscopic analysis was conducted to investigate the impact failure mechanisms of titanium foams with varying porosities, and the contributions of different microstructural factors to strain-rate strengthening were quantitatively evaluated. Dislocation strengthening was identified as the dominant mechanism, while the contribution from grain refinement strengthening was insignificant. |
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| ISSN: | 2238-7854 |