About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
|
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Twinning Engineering of High-entropy Alloys |
Author(s) |
Hyoung Seop Kim |
On-Site Speaker (Planned) |
Hyoung Seop Kim |
Abstract Scope |
To improve the mechanical properties of high entropy alloys, especially strain hardening performance, a long-proven concept of 'twinning engineering' developed in relation to TWIP steels has been applied to this group of materials. The strategy chosen included a two-stage thermodynamic treatment consisting of low-temperature pre-transformation and subsequent annealing. This approach has been tested with an exemplary high entropy alloy in CoCrFeMnNi. The selected annealing conditions ensured that the strain pairs created in the low-temperature strain were maintained while the dislocation density was restored. The viability of this strategy has been convincingly confirmed for the room temperature deformation of the alloy. A constituent model has been proposed to account for the influence of the transforming twins before transformation. It has been shown to provide a reliable explanation for the low and room temperature variants of CoCrFeMnNi. |
Proceedings Inclusion? |
Undecided |