| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
|
| Presentation Title |
Process Consistency in Laser Powder Bed Fusion Observed Through Large Scale Single Bead Melt Pool Measurements |
| Author(s) |
Christian Gobert, Evan Diewald, Jack Beuth |
| On-Site Speaker (Planned) |
Christian Gobert |
| Abstract Scope |
In laser powder bed fusion processes, variation in melt pool geometry can lead to the inclusion of porosity, possibly undermining the integrity of printed structures. Even at constant process conditions, deviations in melt pool geometry due to the stochastic nature of the laser material interactions can occur. The value and variation in melt pool geometry was assessed using single beads printed at the center and edges of the build area, such that the influence of laser incidence angle could be studied. Measurements of melt pool widths were obtained using automated optical imaging of build surfaces. The prohibitive cost of cross-sectional microscopy limited the number of measurements for melt pool depth, however a correlation between width and depth was calculated. From the measurements of melt pool widths and depths, the melt pool can be modeled as a random variable and incorporated into process parameter selection strategies. |