| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
How far away is the quenched multi-principal element alloy from a random solid solution? |
| Author(s) |
Yongwen Sun, Ying Han, Hangman Chen, Judith Yang, Wen Chen, Penghui Cao, Yang Yang |
| On-Site Speaker (Planned) |
Yongwen Sun |
| Abstract Scope |
The short-range order (SRO) in multi-principal element alloys (MPEAs) is known to influence their properties. However, fine-tuning SRO presents a complex challenge. Presumably, quenched samples are commonly deemed closely akin to a random solid solution (RSS), while annealed specimens are associated with a higher degree of SRO. A critical question is: how far away is the quenched multi-principal element alloy from a random solid solution? Here, integrating an enhanced transmission electron microscopy (TEM) characterization method, additive manufacturing, and atomistic modeling, we characterize SRO in three CoCrNi-based face-centered-cubic (FCC) MPEAs. Our investigation reveals a surprising finding: SRO forms rapidly during the solidification process, even at high cooling rates. Thus, rapidly quenched samples can retain a significant degree of SRO and deviate far from an RSS state. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, Modeling and Simulation |