| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Discovery and Insertion of Next Generation Structural Materials
|
| Presentation Title |
Amorphous to Crystalline: High-throughput Thermal Stability Investigation on IV- and V- group Refractory High-entropy Alloy Systems |
| Author(s) |
Changjun Cheng, Renfei Feng, Tianyi Lyu, Yu Zou |
| On-Site Speaker (Planned) |
Changjun Cheng |
| Abstract Scope |
Previous high-throughput studies utilizing magnetron co-sputtering and synchrotron X-ray techniques elucidated the phase transition from crystalline to glass/crystal nanocomposite, as well as their associated formation mechanisms. However, the thermal stability of such nanostructures has yet to be determined. In response, we propose a combinatorial approach based on high-throughput annealing methods to evaluate the phase and grain size stabilities of nanoscale refractory high-entropy alloy (RHEA) thin films with varied compositions. Results of TiZrHfNbTa system reveal that, as temperature increases, no obvious phase transition or grain growth occurs in crystalline BCC samples below 500 Celsius; however, amorphous samples undergo an obvious phase transition to BCC structure at only 200 Celsius. Other RHEAs with lower configuration entropy, including TiZrNb, TiZrTa, and TiZrNbTa, incline to directly form a crystalline state during deposition, and they undergo a more significant degree of grain growth during annealing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Phase Transformations, Thin Films and Interfaces |