About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dilute Alloying and Impurity Effects on Phase Transformations
|
| Presentation Title |
Oxygen Dynamic Partitioning Endows Superior Strength-Deformability Synergy in Crystalline-Amorphous Nanolaminates |
| Author(s) |
Jurgen H. Eckert |
| On-Site Speaker (Planned) |
Jurgen H. Eckert |
| Abstract Scope |
Crystalline-amorphous nanolaminates have potential for a unique combination of strength and deformability; however, due to significant mechanical property mismatch, reaching excellent strength-deformability synergy remains challenging. Here, we present FeCrNi-O (crystalline)/TiVNbHf-O (amorphous) nanolaminates designed by reducing the mismatch between the crystalline and amorphous layers via oxygen dynamic partitioning for developing ultra-strong and largely deformable alloys. The mechanical performance can be tuned by controlling the amorphous volume fraction. The progressive rise in interstitial oxygen within the crystalline layer and the resultant solid solution strengthening gradually reduce the mismatch between the crystalline and amorphous layers. The crystalline and amorphous phases, along with crystalline-amorphous interfaces, undergo synergistic and uniform deformation without shear banding, allowing the materials to achieve both ultra-high strength and extensive homogeneous plastic deformation. These findings provide a novel approach – oxygen dynamic partitioning – as a strategy for designing nanolayered materials that achieve both ultra-high strength and extensive plasticity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Mechanical Properties, Thin Films and Interfaces |