Figure 2 | Scientific Reports

Figure 2

From: Revealing particle-scale powder spreading dynamics in powder-bed-based additive manufacturing process by high-speed x-ray imaging

Figure 2

Dynamic x-ray images showing the evolution of dynamic repose angle “α” during the spreading of 316 L stainless steel powders with two different average powder diameters. (a–c) 316 L stainless steel powder with an average diameter of 67 µm. (d–f) 316 L stainless steel powder with an average diameter of 23 µm. The two powders were spread with a constant spreading speed of 11.5 mm/s from left to right. A rigid aluminum blade with a flat front (perpendicular to the building platform), was used as the wiper. The powder was spread under an ambient pressure of 1 atm within a stainless steel chamber. The dynamic repose angle “α” of the powder is indicated by the yellow line on each picture.

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