| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Computational and Experimental Study of Up-/Down-surface Characteristics of Sloped Samples in L-PBF Process |
| Author(s) |
Nismath V H, Santosh Rauniyar, Kevin Chou |
| On-Site Speaker (Planned) |
Nismath V H |
| Abstract Scope |
Laser Powder Bed Fusion (L-PBF) is utilized in various industries, but its full potential is hindered by inconsistent quality of the built parts. For features with inclined surfaces, surface finishes are particularly poor, as one of the most unfavorable defects for load-bearing surfaces of L-PBF components. The surface roughness is strongly affected by the contouring parameters. This study proposes a multi-layer, multi-physics simulation framework to understand the factors exacerbating the inclined surface finishes. Simulation results indicate that porosities formed due to insufficient melting in low-energy contouring scans increase the surface roughness for up-skin regions. While the visualization of the attached particles remains challenging for the down-skin surface, the simulation results show a lower and abnormal thermal gradient at the melt boundary due to the poorly supported melt region. The simulated trend was compared through a comprehensive Design of Experiment, and the simulation results qualitatively agree well with the experimental data. |