About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Solid-State Materials: An SMD Symposium Honoring William J Weber
|
| Presentation Title |
Micropillar Compression Testing of Ion-Irradiated High-Entropy Alloys |
| Author(s) |
Jackson Martin, Kelvin Xie |
| On-Site Speaker (Planned) |
Jackson Martin |
| Abstract Scope |
Nanoindentation is the conventional technique for characterizing irradiation hardening in ion-irradiated materials due to its high throughput and small sampling volume, with hardness serving as a proxy for yield stress via the Tabor relation. Micropillar compression, however, samples a uniaxial stress state, allowing direct extraction of engineering stress-strain curves and yield stress. Additionally, the plastic deformation is confined within the irradiated layer rather than extending into the underlying pristine material through the spatially diffuse, depth-dependent plastic zone characteristic of indentation. Of the 20 alloys we surveyed by nanoindentation, micropillar compression testing was performed on the two exhibiting the lowest and highest irradiation hardening responses. This enabled a direct assessment of the consistency between the two techniques and provided insight into how distinct microstructural defects (dislocation loops and precipitate refinement) give rise to differing hardening outcomes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, High-Entropy Alloys |