|About this Abstract
|Materials Science & Technology 2020
|Additive Manufacturing Modeling and Simulation: AM Materials, Processes, and Mechanics
|Expanding Process Space of Laser Powder Bed Additive Manufacturing Using Alternative Scan Strategies
|Elizabeth Chang-Davidson, Nicholas Jones, Jack Beuth
|On-Site Speaker (Planned)
Metals additive manufacturing is an emerging field in manufacturing, in which one commonly used technology is laser powder bed fusion (L-PBF). Melt pool sizes in L-PBF are closely tied to printed part material properties, but are currently limited by keyholing porosity flaws or by machine limits on laser power and velocity. For carefully selected process parameters, much larger than typical melt pools were created by rapidly scanning the laser back and forth across a constant width. A systematic way to apply this technique was mapped across laser power and velocity using semi-analytical simulation software. Sample single stripes and sample cubes were printed using parameters selected to span power and velocity process space. These experimental results were used to calibrate the simulations and demonstrate viability of the technique. This systematically applicable technique increases the range of melt pool sizes and therefore range of material properties possible to print using L-PBF machines.