Abstract
The hot compression simulation experiment of Ti-5Al-5Mo-5V-3Cr-1Zr (Ti-55531) alloy in β phase region with deformation temperature at 860, 885, 910, 935 ℃ and strain rate at 0.001, 0.01, 0.1, 1 s-1 was carried out by the Gleeble3500 thermal compression simulation machine. The microstructure evolution of the Ti-55531 was analyzed by OM. The results reveal that the dynamic softening effect of Ti-55531 alloy during the hot deformation is dominated by the dynamic recovery, and the microstructure is characterized by dynamic recrystallization at low strain rate. In order to describe the flow stress behavior by the material deformation mechanism, a unified constitutive model of Ti-55531 alloy based on dislocation density in β phase region was established considering the influence of hardening and dynamic softening mechanism on the dislocation density. The results indicate that the prediction model can accurately predict the hot deformation behavior of Ti-55531 alloy in β phase region.
| Translated title of the contribution | Hot Deformation Behavior and Dislocation Density Based on Constitutive Model of Ti-5Al-5Mo-5V-3Cr-1Zr Alloy in the β Phase Region |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 529-533 |
| Number of pages | 5 |
| Journal | Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys |
| Volume | 41 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 20 May 2021 |
| Externally published | Yes |
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