| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Effect of In-Situ Laser Remelting on Microstructural Evolution and Anisotropy in SS316L from Laser Directed Energy Deposition |
| Author(s) |
Rajendra Hodgir, Ramesh Singh, Soham Mujumdar |
| On-Site Speaker (Planned) |
Rajendra Hodgir |
| Abstract Scope |
The high build rates in Laser-directed energy deposition (L-DED) often compromise build quality due to issues like porosity, poor surface finish, and inherent anisotropy in material properties. These defects necessitate expensive and time-consuming post-processing techniques like heat treatment, hot isostatic pressing, and machining to ensure the usability of L-DED components. Laser remelting (LR) is emerging as an effective in-situ treatment that can reduce porosity, surface roughness, and improve micro-hardness. This study investigates the effect of laser remelting on the inherent anisotropy of SS316L components manufactured at a high deposition rate of 25 g/min, compared to the nominal rate of 7 g/min using the powder-based L-DED process. The investigation includes microstructural characterization and tensile testing along three inclinations : 0°, 45° and 90° relative to build direction. The findings suggest that LR can significantly improve mechanical properties, resulting in isotropic material characteristics while maintaining the advantages of a high build rate. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Surface Modification and Coatings |