Additive manufacturing (AM), also known as 3D printing, has greatly promoted the development of lattice structures with complex configurations. However, these lattice structures usually consist of periodically arranged nodes and struts. Here, inspired by the three-dimensional crystalline microstructure of selective laser melted (SLM) Al–Si alloy, a type of novel cellular structure with irregular nodes and struts was designed and fabricated by the SLM process with Al–Si alloy powder. The as-fabricated cellular structures were multi-scale materials from nano- to macro-scale. Electron backscatter diffraction (EBSD) analysis revealed that compared with the edge region, the central region of the struts had larger grain size, dominant (001) grain orientation, and worse toughness. Most importantly, compared with the regular lattice structures, the novel cellular structures brought about maximum 32.8% and 38.3% improvement in volumetric energy absorption W_v and specific energy absorption W_s, respectively. Furthermore, the finite element simulation was employed to reveal the stress distribution and energy absorption mechanism of cellular components during compression. Finally, the different fracture modes between the edge and central regions of the struts were investigated. The Al–Si crystalline microstructure inspired cellular structures have potential applications in biomaterials, vibration and thermal insulation.

增材制造（AM），也称为3D打印，极大地促进了具有复杂配置的晶格结构的发展。但是，这些晶格结构通常由周期性排列的节点和支柱组成。在此，受选择性激光熔融（SLM）Al-Si合金的三维晶体微观结构的启发，通过SLM工艺用Al-Si合金粉末设计和制造了一种具有不规则结节和支杆的新型蜂窝结构。制成的蜂窝结构是从纳米到宏观的多尺度材料。电子背散射衍射（EBSD）分析显示，与边缘区域相比，支杆的中心区域具有较大的晶粒尺寸，主要的（001）晶粒取向和较差的韧性。最重要的是，与规则晶格结构相比，W _v和比能量吸收W _s。此外，有限元模拟被用来揭示在压缩过程中细胞组件的应力分布和能量吸收机理。最后，研究了撑杆的边缘和中心区域之间的不同断裂方式。铝硅晶体微结构启发的细胞结构在生物材料，振动和隔热方面具有潜在的应用。