| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
Interaction between Martensite Transformation and Ion-induced Damage in Shape Memory Alloys |
| Author(s) |
Alejandro Hinojos, Daniel Hong, Nan Li, Khalid Hattar, Peter Anderson, Michael J Mills |
| On-Site Speaker (Planned) |
Alejandro Hinojos |
| Abstract Scope |
Traditional efforts in modifying the activation barriers for the martensitic transformation in shape memory alloys have utilized microstructural control through thermal processing and deformation processing. Ion irradiation damage could also create crystallographic defects on important length scales, such as vacancies, dislocations, and voids. Martensite transformation may be controlled through a combination of ion implantation and transformation defects with unique defect templates. The work here will probe the interplay between Ni-ion implantation and irradiation of Ni-rich NiTi through SEM, TEM, and nanoindentation. Thermally cycled and uncycled NiTi were irradiated with several ion irradiation doses in order to understand the interaction between transformation and irradiation induced defects. In-situ observations will enable the observation of the martensitic morphology upon transformation. In-situ cooling experiments will be performed to observe the effects of these defect templates on the martensite morphology upon the forward and reverse transformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Characterization, Phase Transformations |