| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Defect Engineering of Structural and Chemical Short-range Order to Enable Materials for Extreme Environments |
| Author(s) |
Timothy J. Rupert |
| On-Site Speaker (Planned) |
Timothy J. Rupert |
| Abstract Scope |
Defect engineering can induce nanoscale complexion transitions and offers a unique opportunity to add planned short-range order into engineering alloys. In this talk, we explore the use of grain boundaries and dislocations to template structural and chemical short-range order, respectively. For grain boundaries, amorphous complexions have gradients in preferred packing motifs that can be tuned by crystallography and/or grain boundary segregation. With regards to dislocations, local stress fields can modify the bulk solubility limits and lead to nanoscale patches of chemical short-range order. For both complexion types, atomistic models provide a baseline for understanding the development and importance of short-range order, while processing experiments and advanced electron microscopy allow for the study of real-world complexities. Finally, the effect of these defect engineering strategies on important mechanical properties such as strength, strain hardening, and damage nucleation is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Nanotechnology, Thin Films and Interfaces |