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Evaluation of the mechanical compatibility of additively manufactured porous Ti-25Ta alloy for load-bearing implant applications.
Journal of the Mechanical Behavior of Biomedical Materials ( IF 3.372 ) Pub Date : 2019-05-14 , DOI: 10.1016/j.jmbbm.2019.05.019
Nicolas Soro,Hooyar Attar,Erin Brodie,Martin Veidt,Andrey Molotnikov,Matthew S Dargusch

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.



中文翻译:

评估用于承重植入物应用的增材制造的多孔Ti-25Ta合金的机械相容性。

为了提高与宿主组织的机械相容性,将多孔网络整合到承重植入物中是必不可少的。增材制造能够优化金属生物材料的机械性能,特别是通过使用新颖的周期性规则几何结构作为多孔结构。在这项工作中,我们首次使用Schwartz原始晶胞成功地通过选择性激光熔化(SLM)生产了由Ti–25Ta合金制成的固体和晶格结构。该过程的可制造性和可重复性通过宏观结构和微观结构观察以及压缩测试进行了评估。发现机械性能适合于骨置换应用,其弹性模量显着降低,取决于孔隙率的水平,范围从14至36 GPa。

更新日期:2019-05-14
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