| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
H-22: The Effect of Grain Size and Annealing Twin Boundary Density on FeMnSi-based Shape Memory Alloys |
| Author(s) |
Ji Young Kim, Wook Ha Ryu, Geun Hee Yoo, Eun Soo Park |
| On-Site Speaker (Planned) |
Geun Hee Yoo |
| Abstract Scope |
Iron-based shape memory alloys (SMAs), especially Fe-Mn-Si alloys, have great potential in civil engineering structures because of their low cost and shape memory properties based on stress-induced martensitic transformation. In Fe-SMAs, the previous researchers have tried to strengthen the parent austenite phase to enlarge the plastic deformation strain range, leading to enhanced recovery strain. Herein, we suggested Fe-SMA with ultra-fine grain to strengthen the austenite phase. Moreover, to overcome the disadvantage of high annealing twin boundaries density, we fabricated the Fe-SMA with low annealing twin boundaries through thermomechanical treatment. This study is the first to improve recovery strain through grain refinement, especially with a low density of annealing twin boundaries. Therefore, we expect that this study has both the scientific meaning of revealing the grain size effect of non-thermoelastic martensitic transformation and the engineering meaning of offering a guideline for designing Fe-SMA with high recovery strain. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, |