Quasi-static analysis of mechanical properties of Ti6Al4V lattice structures manufactured using selective laser melting

Feng, Qiang; Tang, Qian; Liu, Ying; Setchi, Rossitza; Soe, Shwe; Ma, Shuai; Bai, Long

doi:10.1007/s00170-017-0932-7

Cited by 65 publications

(28 citation statements)

References 37 publications

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“…The results showed that for each structure the measured strut diameter was larger than that of the design value by 4.9–6.9%, which is similar to the reported results . These increments of strut diameter was mainly caused by the attached un‐melted powder or stair‐stepped effect . It is noted that the error bar increased with the increase of diameter value from 41.4 µm ( D 0.75 ) to 65.7 µm ( D 1.50 ).…”

Section: Resultssupporting

confidence: 85%

“…By optimization of process parameters, near‐fully dense components with relative density of ≈99.5% can be fabricated by SLM . Lightweight components with complex structures and excellent mechanical properties have been successfully built by SLM technology, and increasing amount of studies have been recently devoted to investigate the mechanical properties of SLM‐processed lightweight structures . Zhang et al fabricated three types of porous structures including cubic, topology optimization and rhombic dodecahedron, and investigated the energy absorption mechanism and stress distribution of porous structures at the initial stage of deformation through experiments and finite element simulations.…”

Section: Introductionmentioning

confidence: 99%

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Compressive Properties of Bio‐Inspired Reticulated Shell Structures Processed by Selective Laser Melting

Wang

Lin

et al. 2019

Adv Eng Mater

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Owing to reasonable stress, large rigidity and large span, the reticulated shell structure is widely used in the field of aerospace industry. However, its hardto-process nature hinders, the progress of design optimization, and experimental investigation. In this paper, a series of reticulated shell structure, inspired from the diving bell of the water spiders, is designed and fabricated by selective laser melting (SLM) additive manufacturing technology from AlSi10Mg powder. The effects of strut diameter on dimensional accuracy, densification behavior, and mechanical properties of SLM-processed reticulated shell structures are investigated. The results show that all the SLMprocessed reticulated shell structures exhibit high relative density (>99%), which decrease with the increase of strut diameter. The load-displacement curves of all reticulated shell structures exhibit a similar trend including three distinct stages. The structure with strut diameter of 1.25 mm (D 1.25 ) has relatively high specific energy absorption, and energy absorption capability. The fracture mechanism of SLM-processed reticulated shell structures with different strut diameters is analyzed through a combination of finite element simulations and experimental observations. With an increasing strut diameter, the dominant mechanism changes from stress-controlled to porositycontrolled fracture.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Compressive Properties of Bio‐Inspired Reticulated Shell Structures Processed by Selective Laser Melting

Wang

Lin

et al. 2019

Adv Eng Mater

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“…This type of melting defines the differences in material properties and specific rough surfaces of the lattice elements. The properties of lattice structures manufactured in Ti6Al4V using EBM (Ref 5, 7-9) and laser-based PBF systems (Ref [10][11][12] have been explored in several studies. But lightweight lattice structures made from Ti6Al4V are commonly having undesirable fracture modes sometimes leading to a catastrophic collapse of the entire structure, which is partially due to the brittleness of the material.…”

Section: (Ref 4)mentioning

confidence: 99%

Macro- and Micromechanical Behavior of 316LN Lattice Structures Manufactured by Electron Beam Melting

Roos

Botero

Danvind

et al. 2019

J. of Materi Eng and Perform

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This work focuses on the possibility of processing stainless steel 316LN powder into lightweight structures using electron beam melting and investigates mechanical and microstructural properties in the material of processed components. Lattice structures conforming to ISO13314:2011 were manufactured using varying process parameters. Microstructure was examined using a scanning electron microscope. Compression testing was used to understand the effect of process parameters on the lattice mechanical properties, and nanoindentation was used to determine the material hardness. Lattices manufactured from 316L using EBM show smooth compression characteristics without collapsing layers and shear planes. The material has uniform hardness in strut shear planes, a microstructure resembling that of solid 316LN material but with significantly finer grain size, although slightly coarser sub-grain size. Grains appear to be growing along the lattice struts (e.g., along the heat transfer direction) and not in the build direction. Energydispersive x-ray spectroscopy analysis reveals boundary precipitates with increased levels of chromium, molybdenum and silicon. Studies clearly show that the 316LN grains in the material microstructure are elongated along the dominating heat transfer paths, which may or may not coincide with the build direction. Lattices made from a relatively ductile material, like 316LN, are much less susceptible to catastrophic collapse and show an extended range of elastic and plastic deformation. Tests indicate that EBM process for 316LN is stable allowing for both solid and lightweight (lattice) structures.

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“…To explore the differences between designed and as-produced morphological properties, Bael et al used micro-focus X-ray computed tomography (CT) imaging to analyse the errors between designed and as-produced morphological properties [17]. modelling approach by conducting quasi-static analysis on Ti6Al4V (Ti64) lattice structures; the approach was validated by conducting uniaxial compression tests on samples fabricated using SLM [19].…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviours and mass transport properties of bone-mimicking scaffolds consisted of gyroid structures manufactured using selective laser melting

Tang

Feng

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

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Quasi-static analysis of mechanical properties of Ti6Al4V lattice structures manufactured using selective laser melting

Cited by 65 publications

References 37 publications

Compressive Properties of Bio‐Inspired Reticulated Shell Structures Processed by Selective Laser Melting

Compressive Properties of Bio‐Inspired Reticulated Shell Structures Processed by Selective Laser Melting

Macro- and Micromechanical Behavior of 316LN Lattice Structures Manufactured by Electron Beam Melting

Mechanical behaviours and mass transport properties of bone-mimicking scaffolds consisted of gyroid structures manufactured using selective laser melting

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