Manufacturability of lattice structures fabricated by laser powder bed fusion: A novel biomedical application of the beta Ti-21S alloy

Jam, Alireza; Plessis, Anton du; Lora, Carlo; Raghavendra, Sunil; Pellizzari, M.; Benedetti, M.

doi:10.1016/j.addma.2021.102556

Cited by 22 publications

(20 citation statements)

References 61 publications

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“…Indeed, a relatively large cell size was selected to ensure adequate printing accuracy, and therefore, good fatigue performances. More details on the relationship between the cell size, manufacturability, and mechanical properties can be found in [ 16 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

“…In fact, AM lattice structures exhibit a tunable bone-mimicking mechanical behavior in terms of Young’s modulus and fatigue strength as well as a bone-like mass transport behavior [ 15 , 16 , 17 , 18 ]. In particular, the possibility of tailoring its stiffness, reducing the mismatch between the implant and bone tissue, together with the compatibility with new titanium alloys (i.e., β-Ti alloys), guarantee a lower risk of stress shielding, implant loosening, and adjacent bone degeneration [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Nonetheless, for a proper prosthetic device design, it is imperative to consider the biological-related features that a bone TE scaffold should have.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Ti6Al4V/Silk Fibroin Composite for Load-Bearing Implants: A Hierarchical Multifunctional Cellular Scaffold

et al. 2022

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Despite the tremendous technological advances that metal additive manufacturing (AM) has made in the last decades, there are still some major concerns guaranteeing its massive industrial application in the biomedical field. Indeed, some main limitations arise in dealing with their biological properties, specifically in terms of osseointegration. Morphological accuracy of sub-unital elements along with the printing resolution are major constraints in the design workspace of a lattice, hindering the possibility of manufacturing structures optimized for proper osteointegration. To overcome these issues, the authors developed a new hybrid multifunctional composite scaffold consisting of an AM Ti6Al4V lattice structure and a silk fibroin/gelatin foam. The composite was realized by combining laser powder bed fusion (L-PBF) of simple cubic lattice structures with foaming techniques. A combined process of foaming and electrodeposition has been also evaluated. The multifunctional scaffolds were characterized to evaluate their pore size, morphology, and distribution as well as their adhesion and behavior at the metal–polymer interface. Pull-out tests in dry and hydrated conditions were employed for the mechanical characterization. Additionally, a cytotoxicity assessment was performed to preliminarily evaluate their potential application in the biomedical field as load-bearing next-generation medical devices.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid Ti6Al4V/Silk Fibroin Composite for Load-Bearing Implants: A Hierarchical Multifunctional Cellular Scaffold

et al. 2022

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“…AM techniques provide more design freedom compared to conventional manufacturing methods, providing the ability to create complex lightweight parts with increased functionality. A new trend in the design of AM components is to replace solid volumes with lightweight cellular structures for several advantages such as improving energy consumption efficiency and improving material utilization [10][11][12][13][14][15][16]. Gibson and Ashby [17] showed that the mechanical performance of cellular structures is strongly related to their volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Design, fabrication, and evaluation of functionally graded triply periodic minimal surface structures fabricated by 3D printing

Hassan

Enab

Fouda

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

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Cellular structures are a favorite selection for the design of lightweight components and energy absorption applications due to several advantages such as their customizable stiffness and strength. In this investigation, functionally graded (FG) triply periodic minimal surfaces, Schoen-IWP (SIWP), and Schwarz primitive (SPrim) cellular structures were fabricated by masked stereolithography (MSLA) technique using ABS-like gray resin. The sample morphology, deformation behavior, mechanical characteristics, and energy absorption of graded and uniform structures were studied using experimental compression tests. The FG sample structures exhibited layer-by-layer collapse delaying shear failure. On the other hand, uniform samples showed complete diagonal shear failure. The total energy absorption to the densification point was 0.52 MJ/m3 and 0.58 MJ/m3 for graded and uniform SIWP, respectively. Additionally, the absorbed energy of the graded SPrim structure was 0.59 MJ/m3 while the uniform one absorbed 0.27 MJ/m3. The investigations showed that the graded SPrim absorbed more energy with high densification strain during the compression test.

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“…[15] Although some investigations are performed on hollow truss lattice structures of 304 stainless steel, [16][17][18] composite truss, [19] and polymers, [20][21][22] most of the previous studies [23][24][25][26] on titanium alloy lattice structures are performed on solid truss lattice structures. Recently, Jam et al [1] manufactured cubic lattices of the β-titanium alloy Ti-21S and studied their mechanical and physical properties. It was reported that the geometrical accuracy of the lattice structures is realized only for unit cells with dimensions more than 4 mm.…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures

et al. 2023

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Herein, the design, manufacturing, and mechanical testing of hollow‐strut lattice structures of the metastable β‐titanium alloy Ti–24Nb–4Zr–8Sn (Ti2448) are performed. Due to the absence of studies in the literature, this study focusses on two important aspects: 1) the designing of micro‐architectured lattice structures and 2) metastable β‐titanium alloy. Face‐centered cubic (FCC) and body‐centered cubic (BCC) hollow‐strut lattices are designed by computer‐aided design and manufactured by laser powder bed fusion. The microstructure of the hollow lattices shows plates of α″‐martensite phase within the β phase. The FCC hollow lattice structure shows higher tensile strength compared to the BCC hollow lattice structure, while the load‐bearing capability of the FCC hollow lattice structure is lower than that of the BCC hollow lattice structure. At lower strains, the tensile force‐displacement curve of the hollow lattice structure matches the simulated tensile force‐displacement curve. At higher strains, a large deviation in the force‐displacement curve is observed in the hollow lattices.

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Manufacturability of lattice structures fabricated by laser powder bed fusion: A novel biomedical application of the beta Ti-21S alloy

Cited by 22 publications

References 61 publications

Hybrid Ti6Al4V/Silk Fibroin Composite for Load-Bearing Implants: A Hierarchical Multifunctional Cellular Scaffold

Hybrid Ti6Al4V/Silk Fibroin Composite for Load-Bearing Implants: A Hierarchical Multifunctional Cellular Scaffold

Design, fabrication, and evaluation of functionally graded triply periodic minimal surface structures fabricated by 3D printing

An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures

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