Lightweight lattice structures have great potentials for the application in medical industries due to their large specific surface area and high strength-to-weight ratio. Selective laser melting (SLM) as one of the most attractive additive manufacturing processes has been widely used for the fabrication of porous structures. In this study, two Ti6Al4V lattice structures, trabecular (Trab.) and triply periodic minimal surface (TPMS), were produced through SLM to study the microstructural distribution and compressive properties with different cell types. The results show that cell type has insignificant effect on the microstructure of the SLM lattice structures studied in this work. For both lattice samples, refined near-equiaxed β phase was formed in the lattice struts, while coarse β phase was formed in the solid bulk region. However, cell type posed significant effects on the compressive properties of the lattice structures. The Trab. structure was found to have higher compressive strength and better energy absorption capacity than the TPMS structure. This work demonstrated that the elastic modulus of Trab. (5.58 GPa) and TPMS (5.51 GPa) lattices could be comparable to that of natural bones (0.022–21 GPa) through rational structural parameters design, which can avoid the stress shielding effect that always occurs on biomedical implant.

轻质晶格结构由于其大的比表面积和高的强度重量比而具有在医疗行业中应用的巨大潜力。选择性激光熔化（SLM）作为最具吸引力的增材制造工艺之一已被广泛用于制造多孔结构。在这项研究中，通过SLM生产了两个Ti6Al4V晶格结构，小梁（Trab。）和三重周期性最小表面（TPMS），以研究不同细胞类型的微观结构分布和压缩特性。结果表明，细胞类型对本文研究的SLM晶格结构的微观结构影响不大。对于这两种晶格样品，在晶格支杆中均形成了精制的近等β相，而在整体区域中形成了粗大的β相。然而，单元类型对晶格结构的压缩特性有显着影响。陷阱。发现该结构比TPMS结构具有更高的抗压强度和更好的能量吸收能力。这项工作证明了Trab的弹性模量。（5.58 GPa）和TPMS（5.51 GPa）晶格可以通过合理的结构参数设计与天然骨骼（0.022–21 GPa）相媲美，从而避免了生物医学植入物中始终出现的应力屏蔽效应。