| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
The Influence of Lattice Distortions From Applied Stresses on Functional Properties of Shape Memory Materials |
| Author(s) |
Eliana M. Feygin, Christopher A. Schuh |
| On-Site Speaker (Planned) |
Eliana M. Feygin |
| Abstract Scope |
The classical method for designing low thermal hysteresis shape memory alloys (SMAs) is by changing the composition. In this study, we include applied elastic stresses to the current crystallographic theories of martensitic transformations and analyze how the resulting lattice distortions affect interface compatibility in model shape memory systems. We find that in NiTi, our theory predicts that the strain resulting from realistic applied stresses improves interface compatibility and modulates thermal hysteresis as much as changes in composition do. Furthermore, we find that the relationship between interface compatibility and stress has a strong orientation dependence. We validate our theoretical results on experimental data collected from the literature and extend the theoretical analysis to zirconia-based shape memory ceramics. Our work implies that strain engineering may be an effective strategy for designing shape memory materials with improved functional properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Computational Materials Science & Engineering, Thin Films and Interfaces |