| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
A-51: Nano-scale Heterogeneity-driven Metastability Engineering in Ferrous Medium-entropy Alloy Induced by Additive Manufacturing |
| Author(s) |
Jeong Min Park, Peyman Asghari-Rad, Alireza Zargaran, Jae Wung Bae, Jongun Moon, Hyeonseok Kwon, Jungho Choe, Sangsun Yang, Ji-Hun Yu, Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Jeong Min Park |
| Abstract Scope |
Selective laser melting (SLM) offers unprecedented advantages in fabrication of metals and alloys with complex geometry and unique microstructural features with hierarchical heterogeneity. The SLM process also induces a unique cell structure with high dislocation density and solute segregation at cell boundaries. In the present study, an innovative utilization of unique dislocation network was proposed to achieve superior mechanical properties through metastability engineering of ferrous-medium entropy alloy (FeMEA). While the high dislocation density at cell boundaries contributes to the improvement of yield strength as additional barriers of dislocation movement, the solute segregation at cell boundaries can beneficially control the phase instability of matrix in materials produced by SLM. Our results demonstrate that solute segregation at cell boundaries decreases the face-centered cubic phase stability in the matrix and activates transition of the deformation mechanism from slip to transformation-induced plasticity, which contributes the significant enhancement of strength-ductility combination of FeMEA. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Mechanical Properties |