| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
High-throughput Characterization and Nanoindentation of TiZrHfNbTa High-entropy Alloy Library with Gradient Composition |
| Author(s) |
Changjun Cheng, Renfei Feng, Michel J.R. Haché, Yu Zou |
| On-Site Speaker (Planned) |
Changjun Cheng |
| Abstract Scope |
High-entropy alloys (HEAs) are novel multiple component materials, exhibiting promising mechanical properties at a wide temperature regime. For such materials, slight composition variance is usually accompanied by structure transition, which will subsequently affect the properties significantly. However, traditional methods can only fabricate materials with a single or just a few compositions. In this work, by using the magnetron co-sputtering technique, we fabricate nanoscale TiZrHfNbTa HEA thin films with gradient compositions on Silicon wafers; based on synchrotron X-ray diffraction and fluorescence mapping, we can observe an obvious phase transition from BCC to amorphous structures along with the composition change. The enthalpy and configurational entropy affect the critical cool rate, leading to the sudden change of structures. The large-scale nanoindentation mapping identifies the corresponding nanohardness and elastic modulus in different regions. Both solid solution strengthening and Hall-Patch effect influence the mechanical properties of our high-throughput HEA library with gradient composition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |