| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Metastable Phases and Phase Equilibria: Towards Designing the Next Generation of Alloys
|
| Presentation Title |
The Intrinsic Coupling Between Twinning Plasticity and Transformation Plasticity in Metastable β Titanium Alloys |
| Author(s) |
Yipeng Gao, Yufeng Zheng, Yunzhi Wang |
| On-Site Speaker (Planned) |
Yipeng Gao |
| Abstract Scope |
In addition to conventional dislocation plasticity, mechanical twinning and structural phase transformation are two important mechanisms that contribute to the plasticity of metals and alloys. Mechanical twinning and phase transformation are theoretically distinctive. In spite of established theories to treat mechanical twinning and phase transformation independently, the intrinsic coupling between them has not been well recognized due to the lack of a unified theoretical framework. We suggest a graph approach to analyze the deformation modes arising from the interplay of mechanical twinning and phase transformation. Using metastable β titanium alloys as an example, we show that mechanical twinning and phase transformation are intrinsically coupled in symmetry-breaking processes, which results in multiple interconnected deformation pathways and characteristic twinning modes. Our work not only reveals the physical origin of unique twinning modes observed in experiments, but also provides a new insight into the enhanced plasticity of β titanium alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |