Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Cobalt-chromium alloy"”.
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Corrosion Dynamics of Cobalt-Chromium Alloy F-75 Powder
… joint replacements consisting of a cobalt-chromium-molybdenum alloy requires increasing concern regarding the inevitable generation of metallic wear debris. Patients with these joint replacements exhibit elevated concentrations of cobalt and chromium ions within their serum, blood …
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The Effect of Particle Surface Area to Volume Ratio on Ion Release from CoCr Spheres
… the long-term consequences of heavy metal alloy use in the body, although early research indicates potentially carcinogenic results. This thesis is a preliminary investigation into these long term effects and their root causes. An improved comprehension of the corrosion kinetics and the …
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An investigation into stent expansion using numerical and experimental techniques
… elasticity was defined using values for MP35N cobalt chromium alloy: Young's Modulus of 232 GPa, Poisson's Ratio of 0.26. A piecewise linear function was used to represent the non-linear plasticity of the material through a von Mises plasticity model with isotropic hardening. Due to symmetry, …
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Development of a patient-specific finite element model of the transcatheter aortic valve implantation (TAVI) procedure
… tissues respectively. The stent is made of a cobalt-chromium alloy and its mechanical response was modelled as an isotropic elastoplastic material, with a linear elastic initial response, followed by plastic behaviour with isotropic hardening. The prosthetic leaflets are made of polymer and …
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Design, microstructure and properties of metastable beta-type biomedical titanium alloys
Many existing implant biomaterials including cobalt-chromium alloy, stainless steel, Ti-6Al-4V and commercially pure titanium have all been shown to demonstrate mechanical incompatibility, poor osseointegration and/or cause cytotoxic effects on the human body after some years of application, …
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Stents for transcatheter aortic valve replacement
… rigorous testing. The stent material, a nickel-cobalt-chromium alloy, was modelled as an isotropic elasto-plastic material with isotropic hardening. The novel stent designs incorporated a native leaflet-mimicking crown shape for continuous leaflet attachment and mechanisms to anchor the stented …