| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Intrinsic Coupling between Phase Transformation and Deformation Twinning |
| Author(s) |
Yipeng Gao |
| On-Site Speaker (Planned) |
Yipeng Gao |
| Abstract Scope |
Phase transformation and deformation twinning are two important mechanisms that can generate a variety of microstructures in metallic materials. Although both of them are symmetry-breaking processes and theories to treat each of them individually have been well-established, the intrinsic coupling between the two has not been investigated. Here we employ a phase transition graph approach to analyze systematically deformation modes arising from the interplay between phase transformation and deformation twinning. Using typical BCC metals as examples, we show that mechanical twinning and phase transformations are intrinsically coupled through correlated broken symmetry, which results in multiple interconnected transformation and non-transformation deformation pathways and characteristic twinning modes. This work not only reveals the physical origin of unique twinning modes recently observed in experiments, but also establishes a theoretical foundation to place phase transformation and deformation twinning on an equal footing from a crystallographic point of view. |
| Proceedings Inclusion? |
Planned: |