Laser powder bed fusion of node-reinforced hybrid lattice structure inspired by crystal microstructure: Structural feature sensitivity and mechanical performance

Li, He; Gu, Dongdong; Yang, Jiankai; Shi, Keyu; Yuan, Luhao

doi:10.1016/j.msea.2022.144048

Cited by 15 publications

(2 citation statements)

References 49 publications

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“…Following an initial stage of linear elastic deformation, it was observed that the initial collapse primarily occurred in vertical struts in the upper and lower layers, resulting in localized buckling. It is seen that buckling continued until the stress dropped down and a diagonal shear band started to appear, similar to the findings of numerous studies (Mazur et al , 2016; Maconachie et al , 2022; Liu et al , 2022) that investigated the deformation behavior of the FCCZ lattice structures. As the struts experienced severe buckling, a collapse occurred across the diagonal shear bands and the localization of diagonal shear deformation became evident, as seen at 20% strain values as highlighted with the red dashed ellipse.…”

Section: Resultssupporting

confidence: 87%

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

Seremet,

Babacan

2024

RPJ

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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.

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Section: Resultssupporting

confidence: 87%

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

Seremet,

Babacan

2024

RPJ

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“…This discrepancy was due to the influence of the heat‐affected zone on the lower surface of the struts, when the melt pool solidifies, the powder near the heat‐affected zone does not completely melt, forming a fluctuation zone on the lower surface of the struts. [ 41 ] Finally, slight sagging was observed below the nodes of the samples, as shown in Figure 6d′, which was attributed to significant variations in area and position between the two adjacent layers caused by the smooth convergence of the struts. [ 42 ] Besides, residual stresses formed by the rapid expansion and cooling of the sample during the preparation process resulted in cracks on the surface of the struts, [ 43 ] as shown in Figure 6b″.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Selective Laser Melting‐Processed Multihierarchical Lattice Structure Based on Body‐Centered‐Cubic Unit Cell

Nie,

Ren,

Gao

et al. 2024

Adv Eng Mater

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In this work, three types of multi‐hierarchical lattice structures (MHLSs) with different configurations were designed based on the body‐centered cubic (BCC) unit cell. The designed lattice structures were fabricated using Ti‐6Al‐4V powder as feedstock material through selective laser melting (SLM) technology. The microstructure and surface morphology of the SLM‐formed samples were observed by optical microscopy and scanning electron microscopy, respectively. Theoretical calculation and quasi‐static compression experiment were carried out to investigate their mechanical properties. The result showed that the size error of slave‐cell with small strut diameters was greater than that of master‐cell with larger strut diameters. All MHLSs exhibited superior mechanical properties compared to the BCC lattice structure. Moreover, the specific elastic modulus and specific yield strength of MHLSs with the best mechanical properties were 70.1 % and 51.0 % higher than that of BCC lattice structure, respectively. Meanwhile, theoretical calculation results of the elastic modulus and yield strength were consistent with the results of quasi‐static compression testing. The fracture morphology analysis indicated that the struts of the MHLSs samples exhibit a mixed brittle‐plastic fracture mode, while the nodes exhibit a plastic fracture mode.This article is protected by copyright. All rights reserved.

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Mechanical Properties and Deformation Behaviors of Node‐Reinforced Ti–6Al–4V Lattice Structures Manufactured by Laser Powder Bed Fusion

Zhao,

Ren,

Cai

et al. 2024

Adv Eng Mater

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Node reinforcement represents an effective strategy for enhancing the mechanical properties of lattice structures. Herein, four types of body‐centered‐cubic with Z‐strut (BCCZ) lattice structures with different node arrangements are fabricated using laser powder bed fusion (LPBF) technology. The surface morphology of four node‐reinforced BCCZ lattice structures fabricated by LPBF is examined using scanning electron microscopy. Quasistatic compression tests are conducted on these four types of node‐reinforced lattice structures. The experimental results show that the mechanical properties of all samples with node‐reinforced BCCZ lattice structures are superior to those of the traditional BCCZ lattice structure. Furthermore, the mechanical properties of the lattice structure improve in proportion to the density of the reinforced node sphere arrangement. Concurrently, an analysis of the deformation behavior of the BCCZ lattice structure with node reinforcement reveals that the TFB‐3 exhibits shear band formation at a strain level of 6.2%, which is the highest strain among all the tested structures. The results indicate that the diagonal reinforcement strategy can significantly minimize the formation of shear bands and enhance the mechanical properties of BCCZ lattice structure.

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Laser powder bed fusion of node-reinforced hybrid lattice structure inspired by crystal microstructure: Structural feature sensitivity and mechanical performance

Cited by 15 publications

References 49 publications

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

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

Mechanical Properties of Selective Laser Melting‐Processed Multihierarchical Lattice Structure Based on Body‐Centered‐Cubic Unit Cell

Mechanical Properties and Deformation Behaviors of Node‐Reinforced Ti–6Al–4V Lattice Structures Manufactured by Laser Powder Bed Fusion

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