| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Microstructural Control in Directed Energy Deposition: In-Situ Layer Thickness Control and Analytical Modeling with 316L Stainless Steel |
| Author(s) |
William Kunkel, Dan J. Thoma |
| On-Site Speaker (Planned) |
William Kunkel |
| Abstract Scope |
Additive manufacturing (AM) techniques provide opportunities for the fabrication of advanced materials with unique microstructures compared to conventional manufacturing techniques. The directed energy deposition (DED) system has the potential for in-situ microstructural control through manipulating processing conditions and or composition. However, the ability to define, predict, and control these responses within the processing-structure-property (PSP) relationships is not mature. In this study, an in-situ microstructure design method through varying the layer thickness during fabrication is presented. 316L stainless steel was used as the model system, and bulk parts were manufactured under various processing conditions. Changes in process parameters resulted in layer heights ranging from 0.28 to 1.06 mm, which led to variations in dendrite arm spacing (2.7 to 5.1 µm) and hardness (160 to 219 HV). An analytical model for predicting layer height and the factors affecting layer height, including powder capture efficiency and process parameters, is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, |