About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Entropy Materials: Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond VI
|
| Presentation Title |
BCC particle-induced distorted dislocation patterns and deformation twinning in the equiatomic FeCrNi alloy |
| Author(s) |
Jinkyung Kim, Jin-Seob Kim |
| On-Site Speaker (Planned) |
Jinkyung Kim |
| Abstract Scope |
The deformation of FCC materials often leads to the formation of dislocation patterns consisting of dislocation-rich and dislocation-poor regions. However, the effect of particles on dislocation patterns in FCC materials has not been well understood. Therefore, we studied the impact of BCC particles on deformation mechanisms and dislocation patterns, using the FeCrNi equiatomic alloy as a model system. The FeCrNi alloy exhibits a microstructure of single FCC or an FCC matrix with BCC particles, depending on annealing conditions. We compared the deformation mechanisms of single FCC material and BCC-containing material. The single FCC material displayed a mixture of planar slip and dislocation cells, while the BCC-containing material showed distorted dislocation patterns due to the BCC particles. Additionally, the BCC-containing materials exhibited extensive deformation twinning during cryogenic deformation. The combination of distorted dislocation patterns and deformation twinning contributed to the superior cryogenic strength-ductility balance of the BCC-containing material. |