Research Article
Foaming Behavior and Pore Structure Evolution of Foamed Aluminum under the Extrusion Constraint
Table 2
Heating, foaming, and expansion parameters of samples at different furnace temperatures.
| Furnace temperature, TL (°C) | Pipe A | Pipe B | Characteristic parameters | 800 | 760 | 760 | 740 |
| Time to enter the plateau zone | 150 | 170 | 170 | 170 | Time length of the plateau zone (s) | <100 | 100 | 100 | 150 |
| Filling point | Time (s) | 320 | 345 | 330 | 370 | Temperature, Ts (°C) | 725 | 727 | 719 | 718 | Expansion height ratio, Hr (mm) | 2.3 | 2.3 | 2.0 | 2.0 |
| Maximum expansion point | Temperatures, Ts (°C) | 740 | 730 | 740 | 740 | Porosity, P0 (%) | 78.7 | 76.1 | 74.4 | 75.1 |
| Collapsing point | Time (s) | 330 | 375 | 350 | 410 | Temperatures, Ts (°C) | 760 | 753 | 748 | 750 |
| Foaming temperature range (°C) | 713–759 | 696–753 | 709–750 | 685–750 | Porosity range, P0 (%) | 60–78.7 | 60–76 | 50–74.4 | 50–75.1 |
|
|