PBF-LB Process-Induced Regular Cavities for Lightweight AlSi10Mg Structures

Abstract

In powder bed fusion with laser beam (PBF-LB), two process-induced defects by pore formation are known: local spherical pores by the keyhole effect and geometrically undefined pores caused by lack of fusion. Both pore types are heterogeneously distributed and can be used for lightweight or damping design applications. The achievable porosity is limited to around 13%. This article presents a novel process-controlled method enabling the targeted and reproducible manufacturing of solid parts with regularly distributed cavities, currently up to 60% porosity in AlSi10Mg, using the balling effect. This eliminates the need for time-consuming digital pre-processing work.

Additively Manufactured Iron‐Based Bulk Metallic Glass Composite Electrocatalysts: Effect of Microstructural States on the Oxygen Evolution Reaction Activity

“…Several studies have suggested that the E L has an influence on the structural properties of PBF‐LB/M manufactured materials such as texture, porosity, and microstructure. [ 30,49,50 ] However, likely to the relatively narrow E L ‐range investigated here, the structural features are similar regardless to the applied E L . To further assess the impact of different microstructural states, samples were annealed, as described earlier.…”