| Title |
Optimization of L-PBF Laser Scan Path Compensation Design for Mitigation Heat Accumulation in Overhang Structure Without Support Structure |
| Authors |
김도현;이재향;배정현;홍석준;연시모;강동석;손용 |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.5.879 |
| Keywords |
Powder Bed Fusion; Overhang Structure; Laser Scan Path Compensation Design; Heat Accumulation; Optical Tomography |
| Abstract |
This study aims to achieve uniformity in heat history by mitigating heat gradients during the production of overhang structures using the metal powder melting process. Specimens with a 30-degree overhang angle were created, and monitoring of thermal radiation intensity during the process confirmed heat accumulation in the specimens. The optimized laser scan path compensation design resulted in a 5.98% reduction in the coefficient of variation of thermal radiation intensity, and X-Ray CT imaging revealed an 80.47% reduction in deformation. With the optimized laser scan path compensation design developed in this study, it is anticipated that the metal powder melting method for manufacturing aerospace components with complex shapes, including overhang structures, will yield a reduction in deformation due to alleviated heat accumulation. |