Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing.
Science
; 368(6491): 660-665, 2020 05 08.
Article
en En
| MEDLINE
| ID: mdl-32381724
ABSTRACT
State-of-the-art metal 3D printers promise to revolutionize manufacturing, yet they have not reached optimal operational reliability. The challenge is to control complex laser-powder-melt pool interdependency (dependent upon each other) dynamics. We used high-fidelity simulations, coupled with synchrotron experiments, to capture fast multitransient dynamics at the meso-nanosecond scale and discovered new spatter-induced defect formation mechanisms that depend on the scan strategy and a competition between laser shadowing and expulsion. We derived criteria to stabilize the melt pool dynamics and minimize defects. This will help improve build reliability.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Science
Año:
2020
Tipo del documento:
Article
País de afiliación:
Estados Unidos