| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Engineered Phase Transformations
|
| Presentation Title |
Microstructure Engineering in Metastable Beta Titanium Alloy |
| Author(s) |
Stoichko Antonov, Zachary Kloenne, Xing Zhang, Dian Li, Yiliang Liao, Hamish Fraser, Yufeng Zheng |
| On-Site Speaker (Planned) |
Yufeng Zheng |
| Abstract Scope |
The microstructure of metastable beta titanium alloys is so sensitive to thermal and/or mechanical treatment that the mechanical performance of metastable beta titanium alloys can be manipulated by the microstructure engineering, especially via the tuning of hcp alpha precipitates in a matrix of bcc beta phase. Our previous study in Ti-5Al-5Mo-5V-3Cr (wt%, Ti5553) has shown that alpha microstructure of three different size scales, namely refined, more-refined and super-refined alpha, can be generated via the selection of different heat treatment conditions. In this work, the factor of mechanical treatment has been taken into consideration for microstructure engineering in Ti5553. For the first time, novel {10 9 3}<331> deformation twin was observed in the cold-rolled Ti5553. The response of cold-rolled Ti5553 to the subsequent heat treatment was explored via advanced electron microscopy. The influence of deformation twin and pre-formed omega phase on the microstructural evolution will be discussed in detail. |