About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Process Development
|
Presentation Title |
A Numerical Study Showing the Impacts of Dwell Time during the Laser Powder Bed Fusion Process |
Author(s) |
David Pervis Failla, Matthew Walter Priddy |
On-Site Speaker (Planned) |
David Pervis Failla |
Abstract Scope |
Laser powder bed fusion (L-PBF) is an additive manufacturing technique often used for producing metallic components with small tolerances. To leverage this precision, process parameters such as scan speed and laser power require calibration via experimental trial and error. Numerical methods, such as sequentially-coupled thermomechanical simulations, can be leveraged to predict part defects and residual stresses. However, the dwell time that occurs during the powder layer deposition of the L-PBF process is often neglected within these frameworks. This work demonstrates the impact of dwell time by simulating the fabrication of 316L stainless steel cubes from 10 mm to 75 mm side lengths. This is to determine the impacts of dwell time on the predicted thermal history and residual stresses in the L-PBF part as a function of cross-sectional area. Validation will be derived by contrasting predicted part deformations and estimated residual stresses with L-PBF printed 316L stainless steel cubes. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |