| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
In-Situ Deformation Study of Non-Shearable Nanodispersion Strengthened Refractory Complex Concentrated Alloys |
| Author(s) |
Md Al Amin Bhuiyan Shuvo, Jaekwon Kim, Eun Soo Park, Hyunseok Oh |
| On-Site Speaker (Planned) |
Md Al Amin Bhuiyan Shuvo |
| Abstract Scope |
In the body-centered cubic (BCC) TiZrNb-O system, ordered oxygen complexes (OOCs) induce significant tetragonal distortions, promoting Frank Read source activation and enhancing ductility. Converting these OOCs into large, robust nano-dispersions (~5-10 nm) may enhance their control over dislocation interactions by increasing the critical shear stress contribution and affect resultant strain localization. Here, we study the effects of size and distribution of non-shearable nanoparticles on dislocation regulation. The BCC alloys with controlled oxygen complexes are designed and fabricated based on CALPHAD and optimized aging heat treatments. Deformation mechanisms and strain localization behavior are analyzed by nanoindentation and in-situ tensile tests inside a scanning electron microscope with micro digital image correlation at various temperatures, followed by detailed microstructure analysis. Overall, manipulating nanoprecipitate characteristics shows potential for reducing strain localization in these alloys, thereby enhancing both strength and ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Other |