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2021
Journal Article
Titel
Crystal plasticity simulation of the macroscale and microscale stress-strain relations of additively manufactured AlSi10Mg alloy
Abstract
Various Al-Mg-Si components produced via additive manufacturing (AM) have many potential applications. Especially for those applications requiring high quality and reliable safety, precise numerical simulations for designing the structures and components are demanded. The particular microstructure of the additively manufactured alloy should be considered to obtain sufficient simulation accuracy. However, crystal plasticity models and simulations for additively manufactured Al-Si-Mg alloys are not well established yet. Here, based on three-dimensional representative volume elements, a crystal plasticity model is applied and solved using the fast Fourier transform method for the AlSi10Mg alloy produced by laser powder bed fusion. We analyzed the effects of the hardening parameters of the Al phase, the effective aspect ratio of Si particles, and the porosity on the mechanical properties at both the macroscale and the microscale systematically and quantitatively. Furthermore, the model parameters were calibrated by the experimental results from in-situ synchrotron X-ray diffraction. The proposed approach provides an effective tool for interpreting the microstructure-property relation of the additively manufactured AlSi10Mg alloy. The resulting macroscopic material properties can be used for optimizing macroscale components and structures. Of course, the methodology can be transferred to other alloys.