Table 2.
Mechanical properties of metal foams with varying porosities and strain rates.
| Fabrication Technique (Strain Rate) |
Material | Porosity | Plateau Stress (MPa) |
Energy Absorption (MJ/m3) |
Reference |
|---|---|---|---|---|---|
| Space-holder technique (Strain rate = 0.01/s) |
Ti foam | 80 | 12.55 | - | [59] |
| Ti foam | 78 | 15.42 | - | ||
| Ti foam | 76 | 15.84 | - | ||
| Ti foam | 74 | 21.61 | - | ||
| Ti foam | 72.4 | 25.43 | - | ||
| Ti foam | 70 | 27.97 | - | ||
| Ti foam | 66.6 | 30.76 | - | ||
| Space-holder technique (Strain rate = 0.01/s) |
Al foam | 50 | 29.5 | 20.9 | [60] |
| Al foam | 60 | 18.8 | 13.5 | ||
| Al foam | 70 | 9.9 | 6.6 | ||
| Melt foaming (Strain rate = 3 × 10−3 s−1) |
Al/0.25 wt.% SiO2 | 86 | 0.8 | 13.7 | [61] |
| Al/0.5 wt.% SiO2 | 84 | 1.4 | 46.2 | ||
| Al/0.75 wt.% SiO2 | 91 | 0.4 | 23.0 | ||
| Al/1.0 wt.% SiO2 | 87 | 0.7 | 18.3 | ||
| Space-holder technique (Strain rate = 0.01/s) |
Ti foam | 68 | 100 | 120 | [62] |
| Ti foam | 57 | 180 | 160 | ||
| Ti foam | 46 | 260 | 220 |