Spattering mechanism of laser powder bed fusion additive manufacturing on heterogeneous surfaces.

ABSTRACT: Laser powder additive manufacturing (PBF-LB) is an additive manufacturing method capable of producing high-precision and fully dense parts. However, nondestructively quality assurance of no internal defects remains challenging. Mitigating internal defects requires elucidating their formation mechanism and improving the PBF-LB process conditions. Therefore, we developed an in-situ monitoring system that combines surface morphology measurement by fringe projection and thermal field measurement with a high-speed camera. On heterogeneous surfaces in a practical multi-track PBF-LB process, a roughness index of the built part surface altered cyclically, consistent with the change in the angle between laser scanning and atmospheric gas flow. The high-speed camera monitoring showed that the melt p

SUBMITTER: Ikeshoji TT 

PROVIDER: S-EPMC9701802 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature