About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Exploiting Solute Segregation and Partitioning to the Deformation-Induced Planar Defects and Nano-Martensite in Designing Ultra-Strong Co-Ni Base Alloys |
| Author(s) |
Akshat M Godha, Mayank Pratap Singh, Karthick Sundar, Surendra Kumar Makineni |
| On-Site Speaker (Planned) |
Surendra Kumar Makineni |
| Abstract Scope |
Stronger metallic alloys are always sought as structural materials to enable efficient, safe, and sustainable operations across various aerospace, automotive, energy, and defence sectors. Among these single-phase, multi-elements (three or more) with high concentrations show exceptional tensile strength up to ~ 0.8-1.2 GPa. However, they possess a very low 0.2% yield strength (YS), i.e., they can be permanently deformed at very low-stress levels of ~ 300 to 600 MPa. Here, we reveal by exploiting atomic-scale solute interactions with the deformation-induced structures to design ultra-strong single-phase alloys with YS > 2 GPa. This was achieved by controlled thermomechanical processing via introducing stacking-faults (SFs), nano-twins (NTs), and nano-martensite ε-laths (NMLs) during cold deformation followed by facilitating solute segregation/partitioning to them by tempering at intermediate temperature. The strategy will open new avenues for designing high strength alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, High-Entropy Alloys |