| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Tailoring the shape-memory and superelastic behaviors in NiTi with Nb inclusion with coherent and semi-coherent interfaces using MD simulations |
| Author(s) |
Adiba Sumaiya Khan, Xiang Shawn Chen, Sakib Al Razi Khan |
| On-Site Speaker (Planned) |
Adiba Sumaiya Khan |
| Abstract Scope |
The study explores the use of freestanding nanowires like Nb to increase the elastic strain limit of NiTi, comparing it to a NiTi alloy to understand phase change, stress, and dislocations.
Molecular Dynamics (MD) simulations were used to assess the impact of interface on the enhanced properties of a Niobium block on a NiTi shape memory alloy.
To compare semicoherent and coherent interfaces in NiTiNb, the composite was relaxed at 500K with a fixed boundary under periodic boundary conditions, followed by a compression test. The coherent interface accelerates martensitic transformation at 500K, improving the material's superelasticity and shape memory capabilities, which are critical for precision actuation and recovery at high temperatures. However, the semicoherent's delayed phase transition implies that the interface precludes the structural changes needed for phase transformation.
The study found that a larger Nb layer enhances phase transformation, super elastic behavior, and shape memory qualities. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Computational Materials Science & Engineering, Modeling and Simulation |