About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
In-Situ Targeted Reheating for Residual Stress Mitigation in Laser Directed Energy Deposition |
| Author(s) |
Logan-Samuel Maurer, Jack Beuth |
| On-Site Speaker (Planned) |
Logan-Samuel Maurer |
| Abstract Scope |
Laser Directed Energy Deposition (DED) is a form of additive manufacturing often used to produce large format parts. However, the inherent thermal gradients of the deposition process lead to significant residual stress buildup. This stress buildup is a primary cause of part failure. While conventional stress relief annealing effectively mitigates these stresses, the need for large, high temperature furnaces results in excessive cycle times and energy costs. This work introduces a novel in-situ approach that leverages the existing laser source to selectively mitigate critical residual stresses. Recognizing that not all residual stresses lead to part failure, this methodology uses Finite Element Model (FEM) predicted residual stress profiles to identify areas for reheating. Accompanying experiments are conducted to validate the approach and corroborate the FEM predictions. Initial experiments have shown reduced build plate distortion in reheated parts, demonstrating the potential of targeted reheating. |