|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||The role of the heterogenous structure on the mechanical properties of additively manufactured AlSi10Mg alloys
||Haoxiu Chen, Sagar Patel, Mihaela Vlasea, Yu Zou
|On-Site Speaker (Planned)
Additive manufacturing (AM) has been widely used to produce AlSi10Mg samples, which have heterogeneous structures. They have coarse cellular dendrites along the melting pools, fine cellular dendrites inside the melting pools, and heat-affected zone with broken Si networks beneath the melting pools. The role of the heterogeneous structures on the mechanical properties of AMed AlSi10Mg is rarely studied. Results show that melting pool boundaries deform more than melting pool interiors during plastic deformation. Gradients of plastic deformation build up across melting pool boundaries. Accommodation of such plastic gradients requires the storage of geometrically necessary dislocations, which contribute to work-hardening. Correspondingly there will be a gradient in the density of geometrically necessary dislocations. Dislocation density depends on the gradient dendrite size and resulting gradient plastic strains. we build up a numerical model based on the melting pool microstructure information to derive the tensile mechanical properties of additive manufactured AlSi10Mg samples.
||Aluminum, Mechanical Properties, Additive Manufacturing