Evaluation of the mechanical compatibility of additively manufactured porous Ti-25Ta alloy for load-bearing implant applications
| Autor: | Matthew S. Dargusch, Nicolas Soro, Erin G. Brodie, Martin Veidt, Hooyar Attar, Andrey Molotnikov |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Surface Properties Alloy Biomedical Engineering Tantalum chemistry.chemical_element Biocompatible Materials 02 engineering and technology engineering.material Prosthesis Design Biomaterials Weight-Bearing 03 medical and health sciences 0302 clinical medicine Elastic Modulus Tensile Strength Materials Testing Alloys Composite material Selective laser melting Porosity Elastic modulus Titanium Lasers 030206 dentistry Prostheses and Implants 021001 nanoscience & nanotechnology Design for manufacturability chemistry Mechanics of Materials Compatibility (mechanics) Bone Substitutes engineering Microscopy Electron Scanning Stress Mechanical Powders 0210 nano-technology |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 97 |
| ISSN: | 1878-0180 |
| Popis: | Integrating porous networks in load-bearing implants is essential in order to improve mechanical compatibility with the host tissue. Additive manufacturing has enabled the optimisation of the mechanical properties of metallic biomaterials, notably with the use of novel periodic regular geometries as porous structures. In this work, we successfully produced solid and lattice structures made of Ti–25Ta alloy with selective laser melting (SLM) using a Schwartz primitive unit-cell for the first time. The manufacturability and repeatability of the process was assessed through macrostructural and microstructural observations along with compressive testing. The mechanical properties are found to be suitable for bone replacement applications, showing significantly reduced elastic moduli, ranging from 14 to 36 GPa depending on the level of porosity. Compared to the conventionally used biomedical Ti–6Al–4V alloy, the Ti–Ta alloy offers superior mechanical compatibility for the targeted applications with lower elastic modulus, similar strength and higher ductility, making the Ti–25Ta alloy a promising candidate for a new generation of load-bearing implants. |
| Databáze: | OpenAIRE |
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