Abstract
The damping behaviors of hot extruded ZA27 alloy were studied by means of a multifunction internal friction apparatus. The experimental results showed that the damping capacities of the alloy increase with increasing of temperature or decreasing of vibrate frequency, whereas vibration amplitude has no marked influence on the damping level in this alloy at the range of vibration amplitude. Hot extrusion can improve damping capacities of as-cast ZA27 alloy. With increasing the temperature, the damping capacities of the hot extruded ZA27 alloy increases rapidly than that of the as-cast ZA27 alloy. For example, the damping capacities of hot extruded ZA27 alloy are respectively higher for 17 percent at 25°C and 44 percent at 145°C than that of as-cast ZA27 alloy. The hot extruded ZA27 alloy has more grain interfaces and higher dislocation densities than as-cast ZA27 alloy, so it possesses higher damping capacities than as-cast ZA27 alloy.
| Original language | English |
|---|---|
| Pages (from-to) | 529-531 |
| Number of pages | 3 |
| Journal | Gongneng Cailiao/Journal of Functional Materials |
| Volume | 36 |
| Issue number | 4 |
| State | Published - Apr 2005 |
Keywords
- Damping capacity
- Hot extrusion
- ZA27 alloy