Abstract Scope |
During metal powder bed fusion processes, properties of the raw material will change after consolidation and cooling in a manner that is controlled by the local thermal history. Our objective is find out how material properties change during metal printing, and incorporate them in the design by topology optimization, such that the topology optimized design represents the true mechanical performance of the fabricated part.
Literature review tells us that during fabrication of metal and alloy products, the formation of grain structure and texture indicates an inherent anisotropy of properties and heterogeneities in local geometry.
In an effort to produce 3D anisotropic lattice-like structures with local heterogeneities, we propose a multi-microstructure, density-based, topology optimization formulation. The formulation indirectly addresses the effect of local temperature history on local material properties. Rather than being treated as a global property, realistic AM-induced material anisotropy will be investigated on a microstructure level. |