Ni–Ti alloys based on triple-periodic minimal surface lattice metamaterials have great application potential. In this work, the triply periodic minimal surface (TPMS) lattice structures with the same volume fraction from a normal Gyroid lattice to an octuple interlacing Gyroid lattice were prepared by the laser powder bed fusion (LPBF) technique. The influence of the interlacing-cell number on manufacturability, uniaxial compression mechanical behaviors, and hyperelastic responses of Ni–Ti lattice structures are analysed by experiments. The stress distributions and fracture mechanism of multicell interlacing lattice structures are illustrated by the finite element method. The obtained results reveal that when the volume fraction is the same, the specific surface area of the lattice structure increases with increasing interlacing-cell number, and the curvature radius of the single-cell strut reduces, which leads to the decrease in the manufacturability of the lattice structure. Meanwhile, the diameter of the single cell strut decreases, and the stress it can bear decreases, which leads to a decline in the compressive mechanical property of the lattice structure. However, the number of struts increases with the increase of interlacing cells, which makes the stress distribution of the lattice structure more uniform. The cyclic compression results indicate that with increasing interlacing-cell number, the proportion of the hyperelastic recoverable strain increases, and the residual strain in the cyclic compression test decreases. For the lattice structure with a chiral arrangement of single cells, the manufacturability, compressive mechanical properties, and hyperelasticity are comparable to those with a normal arrangement. Notably, the Ni–Ti Gyroid TPMS lattice structures have superior hyperelasticity properties (98.87–99.46 % recoverable strain).

基于三周期最小表面晶格超材料的镍钛合金具有巨大的应用潜力。在这项工作中，通过激光粉末床熔融（LPBF）技术制备了从正常Gyroid晶格到八重交错Gyroid晶格的具有相同体积分数的三周期最小表面（TPMS）晶格结构。通过实验分析了交错单元数对 Ni-Ti 晶格结构的可制造性、单轴压缩力学行为和超弹响应的影响。通过有限元方法阐述了多单元交错晶格结构的应力分布和断裂机制。结果表明，体积分数相同时，晶格结构的比表面积随着交错单元数的增加而增大，单单元支柱的曲率半径减小，导致其工艺性下降。晶格结构。同时，单胞支柱直径减小，能承受的应力减小，导致晶格结构的压缩力学性能下降。然而，支柱的数量随着交错单元的增加而增加，这使得晶格结构的应力分布更加均匀。循环压缩结果表明，随着交错单元数的增加，超弹可恢复应变所占比例增大，循环压缩试验中的残余应变减小。对于单胞手性排列的晶格结构，其可制造性、压缩力学性能和超弹性与正常排列的晶格结构相当。值得注意的是，Ni-Ti Gyroid TPMS 晶格结构具有优异的超弹性特性（98.87-99.46% 可恢复应变）。