| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Initial Dislocations Driven Deformation in Additively Manufactured CrCoNi Medium Entropy Alloys |
| Author(s) |
Wanchuck Woo, Hobyung Chae , Soo Yeol Lee , Stefanus Harjo, Ke An |
| On-Site Speaker (Planned) |
Wanchuck Woo |
| Abstract Scope |
It has been known that the initial dislocation density of additively manufactured (AM) alloys is much higher than that of the conventional cast-wrought specimen due to the localized heating and rapid cooling in AM, which results in a large number of geometrically necessary dislocations. Authors observed about 10 times higher initial dislocation density in AM (1.3 x 10^14 m-2) compared to the conventional cast-wrought specimen (0.18 x 10^14 m-2) in CoCrNi medium-entropy alloys. In situ neutron diffraction experiments and analysis results show that the dislocation densities are significantly increasing under deformation, while the twin fault probabilities relatively low. The stacking fault energy will be discussed for the explanation of the dislocation slip dominant deformation mechanism in AM rather than twinning. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Additive Manufacturing |