About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In-Situ Monitoring and Control of Solidification & Deformation Processes in Metal Additive Manufacturing
|
| Presentation Title |
In-Situ Monitoring and Closed-Loop Control of Stainless Steel 316L Direct Energy Deposition via Plasma Plume Dynamics |
| Author(s) |
Mohit Singh, Ravi K. R. |
| On-Site Speaker (Planned) |
Mohit Singh |
| Abstract Scope |
Direct energy deposition (DED) of stainless steel 316L (SS316L) requires precise control over process conditions to ensure build quality and structural integrity. This study investigates plasma plume dynamics as a real-time, in-situ indicator of melt pool behaviour and process regime transitions control. SS316L clads were deposited by varying laser power (400–2000 W) and scan speed to powder feed rate ratios (0.02–0.12 m/g). Plasma plume intensity and area were captured using optical emission spectrometer (OES) and CMOS imaging, while melt pool surface temperatures were recorded using two-colour pyrometer. Plasma plume signal indicates transitions across lack of fusion, conduction, and keyhole modes, which were cross verified through clad morphology analysis. A closed-loop control system based on OES intensity was developed and validated through the additive manufacturing of SS316L thin clad walls, enabling high-precision process adjustments and ensuring structurally consistent, defect-minimized, and metallurgically stable builds, as cross-verified through X-ray computed tomography (XCT). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, Other |