Abstract
The superplasticity and microstructure evolution of Ti75 alloy in a compression testing were studied. The result showed that the strain rate sensitivities, m, was more than 0. 3 at 800°C, 5 × 10-4s-1 and 850°C, 1 × 10-1s-1, but m value reduced at 900°C. Dynamic recrystallization and diffusion of β phase made the lath-like grain become equiaxed, refined and homogeneous, which created a better condition for grain sliding and rotation. In the whole deformation process, diffusion and dislocation movement act as both deformation mechanisms and assommodation ones for boundary sliding.
| Original language | English |
|---|---|
| Pages (from-to) | 479 |
| Number of pages | 1 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 31 |
| Issue number | 6 |
| State | Published - Dec 2002 |
| Externally published | Yes |
Keywords
- Compression test
- Microstructure
- Superplasticity
- Ti75