About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Vacancy Engineering in Metals and Alloys
|
| Presentation Title |
Vacancy-Driven Irradiation-Induced Amorphization and Crystallization in Nanostructured Materials |
| Author(s) |
Janelle P. Wharry, Soumita Mondal, Nicole Keninger, Sooyeon Hwang, Arya Chatterjee, Tristan Olsen, Cyrus Koroni, Sarah Pooley, Hui Xiong |
| On-Site Speaker (Planned) |
Janelle P. Wharry |
| Abstract Scope |
This talk will present a new theory on irradiation-induced crystallization (IIC), in which enthalpy can unify mechanisms of IIC and irradiation-induced amorphization (IIA). Intermetallic compounds and ceramics have long been known to undergo IIA, whereas athermal IIC is an emerging phenomenon. Previous attempts to develop unifying theories of both IIC and IIA have centered around entropic arguments with critical vacancy generation. But such theories require irradiation to increase configurational entropy for IIA and decrease configurational entropy for IIC, still precluding a truly unified theory. Here, we consider enthalpy to explain both IIA and IIC. Enthalpy and entropy are related through the free energy. By considering the role of enthalpic evolution during irradiation, we can predict the direction of IIA or IIC through the overall free energy change. This theory will be supported with experimental observations of IIA and IIC in immiscible metal matrix composites, intermetallic precipitates, and structural ceramics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nanotechnology, Phase Transformations |