About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-43: In-Situ Acoustic Monitoring for Recoater Blade Collision Detection in Laser Powder Bed Fusion Additive Manufacturing |
| Author(s) |
Emmeline Evans, Jin-Yeon Kim, Aaron Stebner |
| On-Site Speaker (Planned) |
Emmeline Evans |
| Abstract Scope |
Laser powder bed fusion (LPBF) is an additive manufacturing technique in which a recoater blade sweeps metal powder onto a substrate and selected regions are melted by a laser. Two common defect modes in LPBF are warping and overbuilding, both of which result in solidified material that is elevated above the intended layer height. During subsequent powder sweeps, the recoater blade will collide with that material, damaging the part and the blade. However, only severe collisions will only trigger autostop functions on commercial LPBF systems, while smaller, yet still damaging, collisions remain undetected until the end of the build. In this work, acoustic emission sensors on the recoater blade subassembly are used to detect, locate, and quantify the severity of collisions in-situ. Acoustic sensing allows for improved sampling frequency and collision sensitivity. This research is supported by NASA Space Technology Graduate Research Opportunities grant 80NSSC23K1213. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Other, Other |