| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Microstructure, Defects, and Properties
|
| Presentation Title |
Exploring the Interplay between Surface Roughness, Porosity, and Processing Parameters for Additively Manufactured 316L Stainless Steel in Laser Powder Bed Fusion |
| Author(s) |
Tianyu Zhang, Lang Yuan, Posadas Dalton |
| On-Site Speaker (Planned) |
Tianyu Zhang |
| Abstract Scope |
Laser powder bed fusion additive manufacturing offers versatility in producing diverse geometric products, of which the mechanical and functional performance hinges upon the surface quality and porosity levels. This study investigates the correlation between surface roughness characteristics and bulk porosity through the analysis of melt pool morphologies across a broad spectrum of processing parameters. It is observed that increasing laser power results in increased vertical surface roughness, while larger melt pools contribute to reduced bulk porosity with higher laser power inputs. Additionally, decreased hatch spacing leads to significantly lower porosity levels and larger melt pool dimensions at the expense of increased vertical surface roughness. With explaining the underlying mechanisms, optimal processing window is proposed and verrfied to achieve both low porosity levels (below 0.5%) and superior vertical surface quality (Sa < 15 μm). |