Abstract
A damping measurement system was developed for high temperature materials using double-reed cantilever specimens by means of resonant-dwell under base excitation in a high-temperature and vacuum environment. Some methods were proposed to improve the accuracy of damping measurement. The effect of air damping on damping tested results was analyzed. The damping of Ti-6-4 alloy was tested by the system and the relationships of material damping to temperature, strain amplitude and vibration frequency were studied. Results show that air damping has a significant effect on the damping of materials. The damping of Ti-6-4 alloy keeps constant and the vibration frequency has little effect on it below 400°C. However, it increases rapidly with temperature elevation above 400°C and the vibration frequency has a complicated effect on it. The effect of strain amplitude on the damping of Ti-6-4 alloy can be neglected in the temperature range from 25 to 600°C.
| Original language | English |
|---|---|
| Pages (from-to) | 1360-1364 |
| Number of pages | 5 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 39 |
| Issue number | 8 |
| State | Published - Aug 2010 |
Keywords
- Double-reed cantilever
- Material damping
- Resonant-dwell
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