Lattice structures with excellent mechanical performance can be achieved through delicate design. In this work, inspired bythe soft–hard multiphase crystals, three types of dual phase lattice structures (DPLS) composed of body-centered cubic withZ-struts (BCCZ) matrix phase and face and body-centered cubic with Z-struts (FBCCZ) reinforcement phase were designedand fabricated by selective laser melting (SLM) using 316L stainless steel powder. Quasi-static compression experimentand numerical simulation were carried out to investigate their mechanical properties, energy absorption and deformationbehavior. The results showed that the mechanical properties of all DPLS samples were higher than that of single phaseBCCZ lattice structure. The four-body diagonal DPLS sample exhibited the highest specific strength and specific stiffness,which was 9.0% and 14.2% higher than single phase BCCZ lattice structure; while, the two-face diagonal DPLS sample hadthe highest specific energy absorption value of 17.45 J/g. Besides, the experimental and simulated results revealed that thearrangements and volume fraction of reinforcement phase had a significant impact on the performance, deformation behaviorand internal stress distribution of the DPLS samples during compressive deformation.
Lattice structures with excellent mechanical performance can be achieved through delicate design. In this work, inspired bythe soft–hard multiphase crystals, three types of dual phase lattice structures (DPLS) composed of body-centered cubic withZ-struts (BCCZ) matrix phase and face and body-centered cubic with Z-struts (FBCCZ) reinforcement phase were designedand fabricated by selective laser melting (SLM) using 316L stainless steel powder. Quasi-static compression experimentand numerical simulation were carried out to investigate their mechanical properties, energy absorption and deformationbehavior. The results showed that the mechanical properties of all DPLS samples were higher than that of single phaseBCCZ lattice structure. The four-body diagonal DPLS sample exhibited the highest specific strength and specific stiffness,which was 9.0% and 14.2% higher than single phase BCCZ lattice structure; while, the two-face diagonal DPLS sample hadthe highest specific energy absorption value of 17.45 J/g. Besides, the experimental and simulated results revealed that thearrangements and volume fraction of reinforcement phase had a significant impact on the performance, deformation behaviorand internal stress distribution of the DPLS samples during compressive deformation.