About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Strengthening mechanisms and interfacial cohesion in lamellar-dendritic AlTiCrV0.5Fe0.5 // Ti-6Al-4V hybrid materials |
| Author(s) |
Younggeon Lee, Byungmin Ahn, Gyosik Youn, Hansung Lee |
| On-Site Speaker (Planned) |
Younggeon Lee |
| Abstract Scope |
A hybrid structure of Ti-6Al-4V and AlTiCrVFe-based high-entropy alloy (HEA) was fabricated via powder metallurgy. This study aims to develop hybrid structures suitable for severe wear and load-bearing applications. A low-density, interface-strong HEA was alloyed and bonded to Ti-6Al-4V via atomic interdiffusion during spark plasma sintering, followed by heat treatment to improve interfacial cohesion.
Microstructural analysis revealed crystallographic orientation and improved lattice coherency at the interface. Increased heat treatment temperatures induced phase transformations in both Ti-6Al-4V and HEA. These resulted in a thicker interface and greater lattice coherency. Nanoindentation analysis revealed a localized increase in hardness at the interface, primarily driven by solid solution strengthening mechanisms. The HEA exhibited high hardness and wear resistance, contributing to the mechanical reinforcement of the hybrid structure.
These results suggest that HEA/Ti hybrid structures hold significant potential for future applications involving optimized internal and external bonding strategies to achieve superior strength and toughness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Joining, Mechanical Properties |