Anisotropy in green body bending strength due to additive direction in the binder-jetting additive manufacturing process

The additive manufacturing (AM) process is a production technology process that has recently attracted attention. Among AM processes, the binder jetting (BJ) method is advantageous because it allows both wide material selection and design freedom. However, the output arrangement, which determines the direction in which the binder is injected during layer stacking, may affect the final physical properties of the fabricated part. In this study, an experiment was conducted to confirm the relation between outputs with the same shape and binder injection direction, while the density of the powder bed was kept uniform. As a result, it was confirmed that the density of the powder bed was uniform at 60.76%, but the bending strength of the resulting part was anisotropic depending on the additive direction.