About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Scan Strategies and Grain Growth of Laser Powder Bed Fusion 316L Stainless Steel |
| Author(s) |
Lucas Turner, Ji Ma, Prosenjit Biswas |
| On-Site Speaker (Planned) |
Lucas Turner |
| Abstract Scope |
Engineers understand the correlation between Laser Powder Bed Fusion process parameters and grain morphology but knowing how these parameters affect melt pool characteristics to ultimately achieve a specific microstructure is underdeveloped. This study investigates the effect of melt pool layout and geometry via hatch distance and layer height on 316L stainless steel grain growth. Hatch distance impacts the exposure of melt pool centerlines, which impedes transverse direction growth. Layer height does not directly impact a melt pool characteristic, but it contributes to the melt pool curvature’s effect on the continuity of either build or transverse direction growth. As a result, a shallow melt pool, small layer height, and large hatch distance scan strategy is predicted to produce large grains in the build direction. Determining process parameter impact on melt pool characteristics like the centerline and boundary curvature enables engineers to manipulate solidification and target microstructure designs and material properties. |