About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Why There is no Invariant Plane Shear in FCC-to-BCC Martensitic Transformation |
| Author(s) |
Bin Li |
| On-Site Speaker (Planned) |
Bin Li |
| Abstract Scope |
It has long been believed that martensitic transformation from FCC to BCC in steels and other important engineering alloys involves an invariant plane shear (IPS) that transforms austenite to martensite, and a lattice invariant shear. It has also been believed that the Bain mechanism is a plausible mechanism for the lattice transformation. However, if the Bain transformation is correct, then the IPS which was based on the observation of line distortion on a sample surface after martensitic transformation, is not possible. This puzzling conflict has not been properly resolved and understood in physical metallurgy. In this presentation, atomistic simulations are performed to investigate the mechanism for FCC-to-BCC transformation. Lattice correspondence is analyzed in the atomic scale. The results show that the Bain mechanism is the correct mechanism, and that line distortion is solely a result of lattice correspondence and is insufficient to draw the conclusion of IPS. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Modeling and Simulation, |