About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Tailoring Dislocation Density in 316L Stainless Steel Formed Via Laser Powder Bed Fusion: The Role of Thermal History on Microstructural Evolution |
| Author(s) |
Justin Warner, Emily Konopka, Sriram Vijayan |
| On-Site Speaker (Planned) |
Justin Warner |
| Abstract Scope |
Laser Powder Bed Fusion (LPBF) is a processing technique that forms dimensionally accurate components with complex geometries through the layer-wise fusion of metal feedstock. 316L Stainless Steel (SS) formed through LPBF often exhibits stronger mechanical properties than alloys formed by traditional manufacturing processes. These improvements have been attributed to the development of metastable phases and complex hierarchical morphologies that are accompanied by high dislocation densities resulting from the complex thermo-mechanical conditions during LPBF processing. These complex dislocation substructures are typically characterized using Electron Backscatter Diffraction (EBSD) and X-Ray Diffraction (XRD). Here, a series of 316L LPBF samples is fabricated to determine the effects of laser scan strategy and specimen geometry on geometrically necessary dislocation density and total dislocation density using EBSD and XRD, respectively. This study aims to understand the ability to tailor site-specific variations in dislocation densities across 316L SS by altering thermal history. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Iron and Steel |