Effect of anisotropic material behavior of AlSi10Mg produced by Selective Laser Melting at multiaxial loading

• Applicant: Professor Dr. Thomas Tröster
• Subject Area: Materials in Sintering Processes and Generative Manufacturing Processes
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 528995277

Additive manufacturing is a third manufacturing process alongside conventional manufacturing technologies such as subtractive manufacturing (milling or turning) and format manufacturing (casting or forging). In additive manufacturing, components are manufactured by adding material layer by layer. The manufacturing technology used, in particular the additive or formative process, can induce distinct directional material properties. In order to improve the predictive quality of the numerical simulations of such materials, the directional properties with respect to plasticity and material failure must be included in the material models. In this research project, the mechanical behavior of materials made of the aluminum alloy AlSi10Mg, which are additive manufactured using the SLM method, is to be investigated. The aim of the investigation is to develop a methodology for characterizing the anisotropic mechanical material properties for this manufacturing process and to derive suitable anisotropic plasticity and failure models. The material properties shall be determined by quasistatic tests under different loading conditions between uniaxial pressure and equibiaxial tension up to fracture. In order to determine the effect of anisotropy on material failure, the failure modes, e.g. failure of or between individual exposure layers, shall be investigated under different loading conditions. In order to establish a causal relationship between the anisotropy of the mechanical properties and the microstructure of the material, this will be investigated and characterized using XRD and EBSD. Based on the material characterization, requirements for mathematical models for transfer into numerical simulation will be defined. These have to represent the mechanical properties but also include the different failure modes.

• DFG Programme: Research Grants