FD CEN ISO/ASTM TR 52952, E67-108 (07/2023)

This document provides an example of the relationship between the characterization of certain macroscopic properties of metal powders and their spreadability in AM PBF-LB/M machines. This relationship is based on a new technique combining measurements inside the PBF-LB/M machine and image processing, developed to quantify the homogeneity of the powder bed layers during spreading. Herein, the flowability of five metal powders is investigated using an automated method with a rotating drum, whose dynamic cohesion index measurement is shown to correlate with the spreadability of the powder during operation. depositing the layers. In addition, the particle size distribution (PSD) and morphology of each powder are characterized before testing by a static image analysis method (in accordance with ISO 13322-1). The general principle of the method is described in Figure 1.
(Automatic translation from French)