Abstract
The superplasticity of fine-grained Ti-6Al-4V wide sheet was investigated by constant strain rate tensile method. The superplastic tensile tests were carried out at temperatures ranging from 1103 K to 1223 K and strain rates ranging from 3.2×10-4 s-1 to 1×10-2 s-1. The results show that tensile elongation to failure values between 100% and 604% are obtained. Microstructure evolution and deformation mechanism were analyzed. Results show that the main deformation mechanism is grain boundary sliding, accommodated by matrix dislocation movement and the intragranular slip of β phase. It is also found that the Ti-6Al-4V wide sheet shows anisotropy when deformed at lower temperatures, which is obviously reduced when deformed at higher temperatures.
| Translated title of the contribution | 细晶Ti-6Al-4V宽幅板材的超塑性变形机理及组织演变 |
|---|---|
| Original language | English |
| Pages (from-to) | 391-397 |
| Number of pages | 7 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 49 |
| Issue number | 2 |
| State | Published - 1 Feb 2020 |
Keywords
- Anisotropy
- Deformation mechanism
- Superplasticity
- Ti-6Al-4V wide sheet