About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Entropy Materials: Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond VI
|
| Presentation Title |
Effects of Al addition in high-entropy alloys
on the structure and properties
|
| Author(s) |
Fuxiang Zhang |
| On-Site Speaker (Planned) |
Fuxiang Zhang |
| Abstract Scope |
In this study, a series of FeNiVAlx medium-entropy alloys (MEAs) were fabricated. The effects of Al microalloying on microstructure and mechanical properties were systematically investigated. As the Al content increased, the FeNiVAlx MEAs transitioned from a dual-phase structure to a single BCC phase in FeNiVAl0.3. This structural change led to reduced strength but significantly improved elongation. Notably, the base FeNiV alloy exhibited the highest yield strength (1851 MPa) but limited ductility (7.8%). In contrast, FeNiVAl0.2 demonstrated an optimal balance of strength and ductility, with a yield strength of 1255 MPa and exceptional ductility exceeding 50% without fracture. The suppression of the brittle sigma phase and the formation of a BCC phase contributed to this strength-ductility trade-off. |