About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Size Effect and Influence of Process Parameters on the Porosity of Thin Struts Fabricated via Laser Powder-Bed Fusion |
| Author(s) |
Nismath Valiyakath Vadakkan Habeeb, Kevin Chou |
| On-Site Speaker (Planned) |
Nismath Valiyakath Vadakkan Habeeb |
| Abstract Scope |
Small-feature fabrications enabled by laser powder-bed fusion (L-PBF) technologies have a wide range of applications, especially in the biomedical industry. However, melt pool fluctuations in highly dynamic L-PBF processing may result in defects like porosity. Melt pool variations across layers depend largely on process parameters like the laser power and the scan speed as well as the scanning strategy. During short-length scanning, melt pool may not reach a quasi-steady state, and hence, fine features like thin struts of dimensions 2 mm or less may exhibit distinctive characteristics compared to making bulk-sized components. This study aims to analyze the porosity characteristics of thin struts fabricated via L-PBF. Thin struts of different sizes and shapes were designed and fabricated using Ti6Al4V powder at various processing conditions. The porosity and dimensional accuracy were characterized using a micro-CT scanner and the results were evaluated using various 2D and 3D image analysis tools. |