Melt pool behaviour during laser powder bed fusion process

- Influence of laser incident angle on the scattering of spatter particles

Abstract

This study describes a melt pool morphology during a single track formation in the laser powder bed fusion processes by visualizing with a high-speed camera. The influence of laser incident angle on a scattering of spatter particles and a formation of heat-affected zone (HAZ) is investigated. As results, the laser incident angle was one of the principal parameters determining the metal powder behaviour, and affected the melt pool morphology and the spatter particle behaviour. The HAZ was also formed according to the laser incident angle and the spatter particles were related to the keyhole formation inside the melt pool.