✦ LIBER ✦

Effect of a change in interfacial geometry on the fatigue strength of porous-coated Ti-6Al-4V

✍ Scribed by Wolfarth, D. ;Ducheyne, P.

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 925 KB
Volume: 28
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820280403

No coin nor oath required. For personal study only.

✦ Synopsis

Porous-coated Ti-6A1-4V has a fatigue strength approximately one-third that of the uncoated alloy. The interfacial geometry between the porous coating and the implant substrate is notchlike, leading to stress concentrations that have been shown to be the main cause for the reduction in fatigue strength. In this study, the effect of interfacial geometry on fatigue strength of porouscoated Ti-6A1-4V is quantified. The interface between porous coating and implant is modeled using linear Philadelphia, Pennsylvania elastic, plane strain finite element analysis. Integrated with the numerical analysis is an experimental verification of enhanced fatigue behavior. Changes in interfacial geometry are conceived, and their effectiveness in reducing stress concentrations are determined. A doubling of fatigue strength can be achieved for newly conceived geometries over conventional porous coating geometries.

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