45S5 BAG-Ti6Al4V structures: The influence of the design on some of the physical and chemical interactions that drive cellular response

Melo-Fonseca, F.; Lima, Rui; Costa, M.M.; Bartolomeu, F.; Alves, Nuno; Miranda, Alice; Gasik, Michael; Silva, F.S.; Silva, N.A.; Miranda, G.

doi:10.1016/j.matdes.2018.08.056

Cited by 22 publications

(5 citation statements)

References 72 publications

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“…As reported by F. Melo-Fonseca et al [40], Ti6Al4V-based cellular structures can be used on implants, such as, hip prosthesis. As previously referred, these structures can be designed to have a specific elastic modulus that suits each patient bone properties that can be obtained by tomography or magnetic resonance imaging 3D data [11][12][13][14].…”

Section: Experimental and Numerical Analysis Comparisonmentioning

confidence: 86%

Predicting the output dimensions, porosity and elastic modulus of additive manufactured biomaterial structures targeting orthopedic implants

Bartolomeu

Fonseca

Peixinho

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

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SLM accuracy for fabricating porous materials is a noteworthy hindrance when aiming to obtain biomaterial cellular structures owing precise geometry, porosity, open-cells dimension and mechanical properties as outcomes. This study provides a comprehensive characterization of seventeen biomaterial Ti6Al4V-based structures in which experimental and numerical investigations (compression stress-strain tests) were carried out. Mono-material Ti6Al4V cellular structures and multi-material Ti6Al4V-PEEK cellular structures were designed, produced by SLM and characterized targeting orthopedic implants. In this work, the differences between the CAD design and the as-produced Ti6Al4V-based structures were obtained from image analysis and were used to develop predictive models. The results showed that dimensional deviations inherent to SLM fabrication are systematically found for different dimensional ranges. The present study proposes several mathematical models, having high coefficients of determination, that estimate the real dimensions, porosity and elastic modulus of Ti6Al4V-based cellular structures as function of the CAD model. Moreover, numerical analysis was performed to estimate the octahedral shear strain for correlating with bone mechanostat theory limits. The developed models can help engineers to design and obtain near-net shape SLM biomaterials matching the desired geometry, open-cells dimensions, porosity and elastic modulus. The obtained results show that by using these AM structures design it is possible to fabricate components exhibiting a strain and elastic modulus that complies with that of bone, thus being suitable for orthopedic implants.

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Section: Experimental and Numerical Analysis Comparisonmentioning

confidence: 86%

Predicting the output dimensions, porosity and elastic modulus of additive manufactured biomaterial structures targeting orthopedic implants

Bartolomeu

Fonseca

Peixinho

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

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“…AM's high design freedom and flexibility enable the production of lightweight components able to retain structural strength, despite exhibiting a significant reduction in weight. Several cellular or lattice structures have been proposed as advantageous solutions for new and disruptive biomedical solutions such as hip implants [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Ti6Al4V Fabricated by Laser Powder Bed Fusion: A Review Focused on the Processing and Microstructural Parameters Influence on the Final Properties

Bartolomeu

Gasik

Silva

et al. 2022

Metals

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Ti6Al4V alloy is an ideal lightweight structural metal for a huge variety of engineering applications due to its distinguishing combination of high specific mechanical properties, excellent corrosion resistance and biocompatibility. In this review, the mechanical properties of selective laser-melted Ti6Al4V parts are addressed in detail, as well as the main processing and microstructural parameters that influence the final properties. Fundamental knowledge is provided by linking the microstructural features and the final mechanical properties of Ti6Al4V parts, including tensile strength, tensile strain, fatigue resistance, hardness and wear performance. A comparison between Laser Powder Bed Fusion and conventional processing routes is also addressed. The presence of defects in as-built Ti6Al4V parts and their influences on the mechanical performance are also critically discussed. The results available in the literature show that typical Laser Powder Bed–Fused Ti6Al4V tensile properties (>900 MPa yield strength and >1000 MPa tensile strength) are adequate when considering the minimum values of the standards for implants and for aerospace applications (e.g., ASTM F136–13; ASTM F1108–14; AMS4930; AMS6932).

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“…Metals, such as Ti6Al4V, have been historically used as orthopedic implant materials, once they meet satisfactorily with some of these requirements in terms of mechanical strength, high corrosion resistance and biocompatibility [1,[5][6][7][8]. However, improvements are still needed to enhance their overall performance once implant loosening often occurs, consequently leading to revision surgeries [4,[9][10][11]. The high elastic modulus and poor wear resistance of Ti6Al4V, besides a non-uniform contact between implant and bone are the three main factors accountable for implants failure [7,9,10].…”

Section: Introductionmentioning

confidence: 99%

Multi-material NiTi-PEEK hybrid cellular structures by Selective Laser Melting and Hot Pressing: Tribological characterization

Costa

Bartolomeu

Palmeiro

et al. 2021

Tribology International

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45S5 BAG-Ti6Al4V structures: The influence of the design on some of the physical and chemical interactions that drive cellular response

Cited by 22 publications

References 72 publications

Predicting the output dimensions, porosity and elastic modulus of additive manufactured biomaterial structures targeting orthopedic implants

Predicting the output dimensions, porosity and elastic modulus of additive manufactured biomaterial structures targeting orthopedic implants

Mechanical Properties of Ti6Al4V Fabricated by Laser Powder Bed Fusion: A Review Focused on the Processing and Microstructural Parameters Influence on the Final Properties

Multi-material NiTi-PEEK hybrid cellular structures by Selective Laser Melting and Hot Pressing: Tribological characterization

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