| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments III
|
| Presentation Title |
Dislocation Defect Phases as a Pathway For The Manipulation of Higher Order Mechanical Properties |
| Author(s) |
Timothy J. Rupert |
| On-Site Speaker (Planned) |
Timothy J. Rupert |
| Abstract Scope |
Local structural and chemical fluctuations around crystalline defects can induce nanoscale defect phase transitions, offering unique opportunities to engineer the properties of metallic alloys. In this talk, we explore the use of dislocations to template linear defect phase formation and subsequently control plasticity. Local stress fields can modify the bulk solubility limits in nearby regions, leading to patterning of chemical order. Strength is noticeably increased, yet more interesting is the possibility of altering complex mechanical properties due to the resultant network of strong obstacles. Atomistic models provide a baseline for understanding dislocation defect phases and their transitions, while processing experiments and transmission electron microscopy allow for the study of real-world defect phase networks. Small-scale mechanical testing is used to demonstrate large increases in the rate sensitivity of strength and strain hardening rates as a result of dislocation defect phases. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nanotechnology, Phase Transformations |