| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
|
| Presentation Title |
Self-healing Mechanisms in Shape Memory Alloys: Molecular Dynamics Study |
| Author(s) |
Ahmed Shaker, Tarek M. Hatem, Iman S. El-Mahallawi |
| On-Site Speaker (Planned) |
Tarek M. Hatem |
| Abstract Scope |
Self-healing materials have been an interest for researchers for the past 15 years for their importance in increasing the lifespan of mechanical parts and structures. On the other hand, Shape Memory Alloys (SMAs) is a class of materials with unique behaviour (including superelasticity and high-damage tolerance) and that made it highly desirable for commercial applications.
SMAs show a promising self-healing behaviour which will be the investigation in this paper. Using molecular dynamics simulations (using LAMMPS) the behaviour of SMAs (specifically NiTi) is investigated. A single crystal with a crack is modelled under both shear and compressive loadings at different temperatures, where the impact of self-healing mechanisms are explored. The simulations showed a relation between the temperature and the amount of shear and compression needed for self-healing. Also, the investigation shows a different behaviour around the phase transformation temperature of NiTi. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Phase Transformations |