| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Characterization of a Duplex CrCoNiAl High-Entropy Alloy Produced by Directional Solidification with Different Cooling Rates |
| Author(s) |
Argos Soares Silva, Francisco Coury, Jose Spinelli |
| On-Site Speaker (Planned) |
Argos Soares Silva |
| Abstract Scope |
Studies suggest that duplex alloys (BCC + FCC) High-entropy alloys may display exceptional mechanical properties. This works aims to assess the influence of the presence of the BCC phase in the Cr44Co35Ni16Al5 HEA and evaluate the impact of cooling rates on microstructure morphology. The alloy was manufactured using directional solidification techniques with low and various cooling rates. This approach emerges as a promising method to stabilize the BCC phase and prevent the formation of the sigma phase. Optical microscopy, SEM and TEM analyses showed that the increase of cooling rate had an effect in reducing dentritic spacing and lamellar spacing in the eutectic regions of the as cast samples. Vickers microhardness and tensile tests revealed that the reducing of those spacings, as well as the presence of the second phase BCC, resulted in increased resistance compared to a similar alloy with a pure FCC microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Solidification, Characterization |