| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Hierarchical α Microstructure in a Metastable β Ti-5Al-5Mo-5V-3Cr Alloy |
| Author(s) |
Dian Li, Wenrui Zhao, Xing Zhang, Stoichko Antonov, Yiliang Liao, Yufeng Zheng |
| On-Site Speaker (Planned) |
Dian Li |
| Abstract Scope |
In the metastable β titanium alloys, α precipitates displaying different morphologies, size scales, and distribution can be achieved from various phase transformation pathways under different thermomechanical treatments. For example, it has been reported that fine-scale α microstructure can be tailored via the assistance of pre-formed metastable nanoscale ω phase during slowly continuous aging. In this work, a hierarchical α microstructure composed of coarse α layers, α sub-layers and fine-scale α plates in a metastable β Ti-5Al-5Mo-5V-3Cr (wt%, Ti-5553) alloy has been studied using scanning electron microscopy and transmission electron microscopy. The number density and morphology of the different α precipitates were quantitatively analyzed using MIPAR image processing software. High-index {10 9 3}<3 3 1>β twin and its substructure were characterized in detail. The role of these high-index twins in the formation of hierarchical α microstructure will be introduced. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Titanium, Characterization |