| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Design of L12 Precipitation-Strengthened Face-Centered-Cubic High-Entropy Alloys |
| Author(s) |
Xuesong Fan, Michael C. Gao, Jonathan D. Poplawsky, Yan Chen, Dunji Yu, Ke An, Chuan Zhang, Lizhi Ouyang, Peter K. Liaw |
| On-Site Speaker (Planned) |
Xuesong Fan |
| Abstract Scope |
High-entropy alloys (HEAs) with face-centered-cubic (FCC) structures are considered potential alternatives for structural applications but are usually limited by their relatively low strengths. An effective solution is to utilize the precipitation-strengthening mechanism. By introducing the ordered L12 precipitates, the strengths of the FCC-based HEAs can be potentially improved due to the dislocation-precipitates interactions, which hinder the dislocation motion. In this study, L12 precipitation-strengthened HEAs with an FCC matrix were designed and developed. By utilizing different heat-treatment procedures, the size of the L12 precipitates could be optimized to enhance the mechanical properties of the designed material. Mechanical tests were conducted on the designed HEA with various annealing time durations at ambient and elevated temperatures. Multi-scale characterization methods were utilized for microstructure analyses. The relationship among thermomechanical processing, mechanical properties, and microstructures was investigated in this work. In-situ neutron diffraction experiments were further performed to understand the strengthening mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Characterization |