Compressive properties of AlSi10Mg lattice structures with novel BCCZZ and FCCZZ configurations fabricated by selective laser melting

• Published in: Rapid prototyping journal 2024-05, Vol.30 (4), p.770-781
• Main Authors: Seremet, Hubannur, Babacan, Nazim
• Format: Article
• Language: English
• Subjects: Additive manufacturing; Alloys; Aluminum alloys; Aluminum base alloys; Compressive properties; Compressive strength; Configurations; Cubic lattice; Deformation; Density; Edge dislocations; Failure modes; Finite element method; Laser beam melting; Lasers; Lattice design; Mechanical properties; Rapid prototyping; Shear bands; Struts; Topology
• ISSN: 1355-2546; 1355-2546; 1758-7670
• DOI: 10.1108/RPJ-06-2023-0191

Purpose This paper aims to examine the static compression characteristics of cell topologies in body-centered cubic with vertical struts (BCCZ) and face-centered cubic with vertical struts (FCCZ) along with novel BCCZZ and FCCZZ lattice structures. Design/methodology/approach The newly developed structures were obtained by adding extra interior vertical struts into the BCCZ and FCCZ configurations. The samples, composed of the AlSi10Mg alloy, were fabricated using the selective laser melting (SLM) additive manufacturing technique. The specific compressive strength and failure behavior of the manufactured lattice structures were investigated, and comparative analysis among them was done. Findings The results revealed that the specific strength of BCCZZ and FCCZZ samples with 0.5 mm strut diameter exhibited approximately a 23% and 18% increase, respectively, compared with the BCCZ and FCCZ samples with identical strut diameters. Moreover, finite element analysis was carried out to simulate the compressive response of the lattice structures, which could be used to predict their strength and collapse mode. The findings showed that while the local buckling of lattice cells is the major failure mode, the samples subsequently collapsed along a diagonal shear band. Originality/value An original and systematic investigation was conducted to explore the compression properties of newly fabricated lattice structures using SLM. The results revealed that the novel FCCZZ and BCCZZ structures were found to possess significant potential for load-bearing applications.