In powder bed fusion of metals by a laser beam (PBF-LB/M) spatters evolve due to evaporation phenomena within the interaction zone of the laser-beam and material. The evaporation is of high importance for the evolution of a melt depression in the process zone. We use high-speed stereoscopic imaging to measure the three-dimensional (3D) time-resolved spatter trajectories. The statistical spatter behavior is correlated with the transition from heat conduction mode into evaporation dominated mode in the interaction zone and its geometry. The results indicate a high potential to use statistical measures of the 3D spatter trajectories for quality assurance in PBF-LB/M.

中文翻译：

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金属粉末床熔合中的行为和工艺区形成

在通过激光束 (PBF-LB/M) 对金属进行粉末床熔合时，由于激光束和材料相互作用区内的蒸发现象，飞溅物会演变。蒸发对于工艺区熔体凹陷的演变非常重要。我们使用高速立体成像来测量三维 (3D) 时间分辨飞溅轨迹。统计飞溅行为与相互作用区中从热传导模式到蒸发主导模式的转变及其几何形状相关。结果表明，在 PBF-LB/M 中使用 3D 飞溅轨迹的统计测量进行质量保证的潜力很大。