Selective Laser Melting of Ti6Al4V-2%Hydroxyapatite Composites: Manufacturing Behavior and Microstructure Evolution

In this work, selective laser melting of Ti6Al4V (Ti64) and 2 wt.% hydroxyapatite (HA) composites was performed with the purpose of osseointegration enhancement and biological fixation between implants and bone tissue. The microstructural evolution and mechanical properties were analyzed by using X-...

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Bibliographic Details
Published inMetals (Basel ) Vol. 11; no. 8; p. 1295
Main Authors Jaber, Hassanen, Kónya, János, Anna Kovács, Tünde
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2021
Subjects
additive manufacturing
Biocompatibility
Bones
Composite materials
Evolution
Fourier transforms
Gases
Grain boundaries
Hydroxyapatite
Laser beam melting
Lasers
Manufacturing
Mechanical properties
metal–ceramic composite
Microhardness
Microstructure
Nanoindentation
Optical microscopy
Optical properties
Particle size
Protective coatings
selective laser melting
Spectrum analysis
Stainless steel
Surgical implants
Tensile properties
Tensile tests
Ti6Al4V alloy
Titanium base alloys
Transplants & implants
United Kingdom > UK
Germany
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Summary:In this work, selective laser melting of Ti6Al4V (Ti64) and 2 wt.% hydroxyapatite (HA) composites was performed with the purpose of osseointegration enhancement and biological fixation between implants and bone tissue. The microstructural evolution and mechanical properties were analyzed by using X-ray diffraction (XRD), optical microscopy (OM), a scanning electron microscope (SEM) equipped with (EDX) and (EBSD) systems, microhardness, nanoindentation, and tensile testing. The results showed that the Ti64-2%HA composite components exhibited complicated manufacturing behavior, which could be correlated with the decomposition of HA. The microstructure was found to mainly consist of α Ti with a small amount of HA distributed along grain boundaries. Furthermore, the interaction between Ti64 and HA leading to the formation of Ti3P, TixO, P, and CaTiO3 phases, resulted in poor tensile properties, as compared to pure Ti64 components. Conversely, the tensile properties of SLM Ti64-2%HA composite components were significantly higher than human bone reported previously in the literature.
ISSN:2075-4701
2075-4701
DOI:10.3390/met11081295