About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Efficient Process Control Model for Laser Powder Bed Fusion Using an Experimentally Validated Heat Source |
Author(s) |
Andrew Moore, Kyle Perkins, Ioannis Bitharas |
On-Site Speaker (Planned) |
Andrew Moore |
Abstract Scope |
We describe the systematic calibration of an experimentally representative heat source for use in a computationally efficient model for the control of laser powder bed fusion (PBF). The simplifying assumptions used are justified via high-speed direct imaging, schlieren imaging and synchrotron x-ray imaging of the laser PBF process. The parameters that characterise the heat source are shown to follow well-defined trends across a range of energy density of the scanning laser beam, for melt pools in the conduction and transition modes typically used in laser PBF, enabling an appropriate source to be calculated even at intermediate energy densities where calibration experiments have not been undertaken. Experimentally calibrated effects such as the laser absorption and the penetration of the vapour depression into the melt pool, which are computationally expensive to calculate from first principles, are incorporated to control process stability in island builds of varying sizes. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Other |