About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
Dislocations as Active Hosts for Boron in Additive Manufactured Ni-Based Alloys |
| Author(s) |
Emre Tekoglu, Tyler Dolezal, Sangtae Kim, Ju Li |
| On-Site Speaker (Planned) |
Emre Tekoglu |
| Abstract Scope |
Boron is widely used as a microalloying element in Ni-based alloys due to its well-established role in enhancing grain boundary cohesion and high-temperature mechanical performance, particularly creep resistance. While boron–grain boundary interactions have been extensively studied, its interaction with dislocations remains largely unexplored. This study provides direct experimental evidence that boron segregates to dislocations in an additively manufactured Ni-based alloy, identifying dislocations as energetically preferred hosts alongside grain boundaries. Complementary atomistic modeling is used to interpret these observations and elucidate the mechanisms governing boron segregation and stability at dislocations. The results suggest that boron–dislocation interactions may contribute to reduced dislocation mobility and enhanced creep resistance by stabilizing deformation-active defects. Together, these findings reveal a previously unrecognized, defect-centric role of dislocations in boron chemistry, with direct implications for the design of Ni-based alloys, particularly additively manufactured materials where high dislocation densities are intrinsic. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Composites, High-Temperature Materials |