Abstract
Fatigue properties and deformation mechanism of Ti2.5Cu alloy were studied after solution and two-step aging at 293 K and 77 K. The results show that the fatigue plastic index of Ti2.5Cu alloy at 293 K and 77 K were -0.68 and -0.5, respectively. At 293 K dislocation slip mechanism was dominant. However, at 77 K twinning shear was rather active and various types of twins were found. Meanwhile, needle-like Ti2Cu strengthening phases hindered movement of dislocation and brought about obvious cyclic hardening, but they had little effect on the twinning process.
| Original language | English |
|---|---|
| Pages (from-to) | 1256-1259 |
| Number of pages | 4 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 39 |
| Issue number | 7 |
| State | Published - Jul 2010 |
Keywords
- Dislocation slip
- Fatigue properties
- Ti2.5Cu alloy
- Twinning shear