| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Metastable Phases and Phase Equilibria: Towards Designing the Next Generation of Alloys
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| Presentation Title |
Exploration of Nano-scaled Metastable Phases in Metastable Beta Titanium Alloys Using Advanced Electron Microscopy and Atom Probe Tomography |
| Author(s) |
Yufeng Zheng, Dong Wang, Stoichko Antonov, Dipankar Banerjee, Rajarshi Banerjee, Yunzhi Wang, Hamish L. Fraser |
| On-Site Speaker (Planned) |
Yufeng Zheng |
| Abstract Scope |
Metastable beta titanium alloys have attracted a significant amount of attention in recent years, due to the fact that the microstructure of metastable beta titanium alloys is very sensitive to thermo-mechanical processes, and therefore its performance can be manipulated by accurately controlled processing conditions. In these alloys, the phase transformation pathways and deformation modes can be significantly influenced by the nano-scaled metastable phases. For example, the size and number density of alpha precipitates in Ti-5Al-5Mo-5V-3Cr can be modified by the pre-formed nano-scaled metastable isothermal omega phase in parent beta phase. In this work, four different nano-scaled metastable phases in the as-quenched or aged metastable beta titanium alloys, including athermal and isothermal omega phase, O' phase and O'' phase, have been systematically studied using advanced electron microscopy and atom probe tomography. The formation mechanism of each phase and their potential influence on microstructure evolution and deformation will be introduced. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |