About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
|
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Effect of Scanning Strategies on Defects Generated by Lack of Fusion during Laser Power Bed Fusion: A Part-Scale Finite Element Simulation Study |
Author(s) |
Alaa Olleak, Albert To, Sneha Narra |
On-Site Speaker (Planned) |
Albert To |
Abstract Scope |
The quality and reliability of additively manufactured parts by Laser Power Bed Fusion (LPBF) are significantly affected by Lack of Fusion (LOF) porosity, caused by insufficient overlap of melt pools. For LPBF parts, LOF porosity is location dependent and affected by both the process parameters and scanning strategy. The widely used few-tracks experimental or numerical approaches to investigate LOF cannot capture the effects of the residual heat and geometrical features. In addition, the experimental investigations of porosity generated during the LPBF process for part-scale are expensive and time consuming. However, leveraging high performance GPUs, adaptive remeshing, and matrix-free Finite Element Modeling (FEM), LOF porosity for part-scale can be predicted. The work proposes the use of this highly efficient framework to investigate the effects of process parameters and scanning strategy on the melt pool size variability due to the geometrical features and residual heat, and thus the location dependent LOF porosity. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |