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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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Putra, Niko Eka
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Topics
Publications (8/8 displayed)
- 2024Biodegradation-affected fatigue behavior of extrusion-based additively manufactured porous iron–manganese scaffoldscitations
- 2023Extrusion-based 3D printing of biodegradable, osteogenic, paramagnetic, and porous FeMn-akermanite bone substitutescitations
- 2022Additive manufacturing of bioactive and biodegradable porous iron-akermanite composites for bone regenerationcitations
- 2022Poly(2-ethyl-2-oxazoline) coating of additively manufactured biodegradable porous ironcitations
- 2021Extrusion-based 3D printing of ex situ-alloyed highly biodegradable MRI-friendly porous iron-manganese scaffoldscitations
- 2021Extrusion-based 3D printed biodegradable porous ironcitations
- 2020Multi-material additive manufacturing technologies for Ti-, Mg-, and Fe-based biomaterials for bone substitutioncitations
- 2018Antibacterial Surfaces Bearing Silver and Zinc Nanoparticles on Additively Manufactured Titanium Implants
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article
Biodegradation-affected fatigue behavior of extrusion-based additively manufactured porous iron–manganese scaffolds
Abstract
Additively manufactured (AM) biodegradable porous iron-manganese (FeMn) alloys have recently been developed as promising bone-substituting biomaterials. However, their corrosion fatigue behavior has not yet been studied. Here, we present the first study on the corrosion fatigue behavior of an extrusion-based AM porous Fe35Mn alloy under cyclic loading in air and in the revised simulated body fluid (r-SBF), including the fatigue crack morphology and distribution in the porous structure. We hypothesized that the fatigue behavior of the architected AM Fe35Mn alloy would be strongly affected by the simultaneous biodegradation process. We defined the endurance limit as the maximum stress at which the scaffolds could undergo 3 million loading cycles without failure. The endurance limit of the scaffolds was determined to be 90 % of their yield strength in air, but only 60 % in r-SBF. No notable crack formation in the specimens tested in air was observed even after loading up to 90 % of their yield strength. As for the specimens tested in r-SBF, however, cracks formed in the specimens subjected to loads exceeding 60 % of their yield strength appeared to initiate on the periphery and propagate toward the internal struts. Altogether, the results show that the extrusion-based AM porous Fe35Mn alloy is capable of tolerating up to 60 % of its yield strength for up to 3 million cycles, which corresponds to 1.5 years of use of load-bearing implants subjected to repetitive gait cycles. The fatigue performance of the alloy thus further enhances its potential for trabecular bone substitution subjected to cyclic compressive loading. Statement of significance: Fatigue behavior of extrusion-based AM porous Fe35Mn alloy scaffolds in air and revised simulated body fluid was studied. The Fe35Mn alloy scaffolds endured 90 % of their yield strength for up to 3 × 10 6 loading cycles in air. Moreover, the scaffolds tolerated 3 × 10 6 loading cycles at 60 % of their yield strength in revised simulated body fluid. The Fe35Mn alloy scaffolds ...