About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
|
| Presentation Title |
Dislocation Motion and Cellular Subgrain Feature
Boundaries in Additively Manufactured 316L Steel: An Experimental Investigation |
| Author(s) |
Hubert K. Bilan, Ajit Achuthan |
| On-Site Speaker (Planned) |
Hubert K. Bilan |
| Abstract Scope |
Dislocation motion and slip across microstructural feature boundaries plays a critical role in governing the elastic-plastic behavior of alloys. We present a comprehensive experimental investigation of dislocation motion across grain boundaries (slip transmission) and cellular subgrain features in additively manufactured (AM) 316L stainless steel. Using in-situ uniaxial microtensile testing integrated with scanning electron microscopy (SEM), we capture the surface deformation behavior of specimens at the microscale. The evolution of slip bands, their intensification and propagation, are systematically characterized and correlated with the underlying crystallographic texture and microstructural morphology. Special attention is given to the interaction of slip bands with grain and subgrain boundaries to assess their effectiveness as barriers to dislocation motion. Experimental observations are then leveraged to critically evaluate classical slip models in the context of the unique microstructure of AM 316L. The insights gained may contribute to a deeper understanding of slip band evolution in AM steel alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |