Improving the Mechanical Properties of Additively Manufactured Micro-Architected Biodegradable Metals

Li, Yageng; Shi, Jirong; Jahr, Holger; Zhou, Jie; Zadpoor, Amir A.; Wang, Luning

doi:10.1007/s11837-021-04949-8

Cited by 7 publications

(3 citation statements)

References 83 publications

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“…Biodegradability is, however, a relatively new addition to the possibilities offered by metallic meta-biomaterials. 99,100 Most reports related to metal biodegradability are limited to Mg, 101,102 Zn, 103 Fe, 104,105 and their alloys. The first reports of architected meta-biomaterials made from biodegradable metals have only recently appeared in the literature.…”

Section: Methodsmentioning

confidence: 99%

“…The first reports of architected meta-biomaterials made from biodegradable metals have only recently appeared in the literature. 87,100,102 This has to do with the difficulty of processing some biodegradable metals with currently available AM processes. For example, Mg is highly inflammable and creates safety concerns, while Zn has a relatively low evaporation temperature that makes it difficult to process with direct metal printing techniques.…”

Section: Methodsmentioning

confidence: 99%

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Design, material, function, and fabrication of metamaterials

et al. 2023

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Metamaterials are engineered materials with unusual, unique properties and advanced functionalities that are a direct consequence of their microarchitecture. While initial properties and functionalities were limited to optics and electromagnetism, many novel categories of metamaterials that have applications in many different areas of research and practice, including acoustic, mechanics, biomaterials, and thermal engineering, have appeared in the last decade. This editorial serves as a prelude to the special issue with the same title that presents a number of selected studies in these directions. In particular, we review some of the most important developments in the design and fabrication of metamaterials with an emphasis on the more recent categories. We also suggest some directions for future research.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Design, material, function, and fabrication of metamaterials

et al. 2023

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“…To date, many studies have focused on obtaining mechanical properties and failure mechanisms of Ti6Al4V TPMS scaffolds using static compression, static tension, and fatigue tests [ 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. However, it is known that scaffolds for bone replacement and orthopaedic implants also undergo bending and torsional loading in the body.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterisation and Numerical Modelling of TPMS-Based Gyroid and Diamond Ti6Al4V Scaffolds for Bone Implants: An Integrated Approach for Translational Consideration

et al. 2022

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Additive manufacturing has been used to develop a variety of scaffold designs for clinical and industrial applications. Mechanical properties (i.e., compression, tension, bending, and torsion response) of these scaffolds are significantly important for load-bearing orthopaedic implants. In this study, we designed and additively manufactured porous metallic biomaterials based on two different types of triply periodic minimal surface structures (i.e., gyroid and diamond) that mimic the mechanical properties of bone, such as porosity, stiffness, and strength. Physical and mechanical properties, including compressive, tensile, bending, and torsional stiffness and strength of the developed scaffolds, were then characterised experimentally and numerically using finite element method. Sheet thickness was constant at 300 μm, and the unit cell size was varied to generate different pore sizes and porosities. Gyroid scaffolds had a pore size in the range of 600–1200 μm and a porosity in the range of 54–72%, respectively. Corresponding values for the diamond were 900–1500 μm and 56–70%. Both structure types were validated experimentally, and a wide range of mechanical properties (including stiffness and yield strength) were predicted using the finite element method. The stiffness and strength of both structures are comparable to that of cortical bone, hence reducing the risks of scaffold failure. The results demonstrate that the developed scaffolds mimic the physical and mechanical properties of cortical bone and can be suitable for bone replacement and orthopaedic implants. However, an optimal design should be chosen based on specific performance requirements.

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