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.

通过增材制造 (AM) 生产的各种 Al-Mg-Si 组件具有许多潜在的应用。特别是对于那些需要高质量和可靠安全性的应用，需要精确的数值模拟来设计结构和部件。应考虑增材制造合金的特定微观结构，以获得足够的模拟精度。然而，增材制造的 Al-Si-Mg 合金的晶体塑性模型和模拟还没有得到很好的建立。在这里，基于三维代表性体积元素，使用快速傅里叶变换方法对激光粉末床熔融生产的 AlSi10Mg 合金应用和求解晶体塑性模型。我们分析了 Al 相的硬化参数、Si 颗粒的有效纵横比、以及系统和定量的宏观和微观力学性能的孔隙率。此外，模型参数通过原位同步加速器X射线衍射的实验结果进行校准。所提出的方法为解释增材制造的 AlSi10Mg 合金的微观结构-性能关系提供了有效的工具。由此产生的宏观材料特性可用于优化宏观组件和结构。当然，该方法可以转移到其他合金。所提出的方法为解释增材制造的 AlSi10Mg 合金的微观结构-性能关系提供了有效的工具。由此产生的宏观材料特性可用于优化宏观组件和结构。当然，该方法可以转移到其他合金。所提出的方法为解释增材制造的 AlSi10Mg 合金的微观结构-性能关系提供了有效的工具。由此产生的宏观材料特性可用于优化宏观组件和结构。当然，该方法可以转移到其他合金。