Selective Laser Melting of Ti6Al4V sub-millimetric cellular structures: Prediction of dimensional deviations and mechanical performance

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abstract

Ti6Al4V sub-millimetric cellular structures arise as promising solutions concerning the progress of conventional orthopedic implants due to its ability to address a combination of mechanical, physical and topological properties. Such ability can improve the interaction between implant materials and surrounding bone leading to long-term successful orthopedic implants. Selective Laser Melting (SLM) capability to produce high quality Ti6Al4V porous implants is in great demand towards orthopedic biomaterials. In this study, Ti6Al4V cellular structures were designed, modeled, SLM produced and characterized targeting orthopedic implants. For that purpose, a set of tools is proposed to overcome SLM limited accuracy to produce porous biomaterials with desired dimensions and mechanical properties. Morphological analyses were performed to evaluate the dimensional deviations noticed between the model CAD and the SLM produced structures. Tensile tests were carried out to estimate the elastic modulus of the Ti6Al4V cellular structures. The present work proposes a design methodology showing the linear correlations found for the dimensions, the porosity and the elastic modulus when comparing the model CAD designs with Ti6Al4V structures by SLM.

keywords

POROUS BIOMATERIALS; LATTICE STRUCTURES; DESIGN; SCAFFOLDS; STRENGTH; FATIGUE; ALLOY; MICROSTRUCTURE; FABRICATION; IMPLANTS

subject category

Engineering, Biomedical; Materials Science, Biomaterials

authors

Bartolomeu, F; Costa, MM; Alves, N; Miranda, G; Silva, FS

our authors

foto Georgina Miranda

Georgina Miranda

Assistant Professor

Groups

G3 - Electrochemical Materials, Interfaces and Coatings

acknowledgements

This work was supported by FCT through the grant SFRH/BD/128657/2017 and the projects PTDC/EMS-TEC/5422/2014_ADAPT-PROSTHESIS, NORTE-01-0145-FEDER-000018 -HAMaBICo and UID/EEA/04436/2019.

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Publication Details

type
Journal Article
year
2021
journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
volume
113
article number
104123
publisher
ELSEVIER
issn
1751-6161
isbn
1878-0180
digital object identifier
10.1016/j.jmbbm.2020.104123
web of science article identifier
WOS:000599655300002

Journal Metrics (JCR 2019)

Journal Impact Factor
3.372
Journal Impact Factor (5 yrs)
3.622
category normalized journal percentile
60.428

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