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Low cycle fatigue behavior of Ti6Al4V thermochemically nitrided for its use in hip prostheses

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Abstract

Titanium and its alloys have many attractive properties including high specific strength, low density, and excellent corrosion resistance. Besides, titanium and the Ti6Al4V alloy have long been recognized as materials with high biocompatibility. These properties have led to the use of these materials in biomedical applications. Despite these advantages, the lack of good wear resistance makes difficult the use of titanium and Ti6Al4V in some biomedical applications, like articulating components of prostheses.

Some surface treatments are available in order to correct these problems, like thermal surface treatment by means of nitrogen gaseous diffusion at high temperature. Nitrogen enters into the material by diffusion, creating a surface layer of increased hardness.

Low cycle fatigue behavior in air of Ti6Al4V alloy has been studied. Results show a reduction of low cycle fatigue life up to 10% compared to the not-treated material. Studies suggest it is not related to the titanium nitride surface layer, but to microstructural changes caused by the high temperature treatment.

© 2001 Kluwer Academic Publishers

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Authors and Affiliations

  1. ETSEIB – Departament de Ciència dels Materials i Enginyeria Metal.lúrgica, CREB – Centre de Recerca en Enginyeria Biomèdica, Av. Diagonal 647, 08028, Barcelona, Spain

    D. Rodríguez, J. M. Manero, F. J. Gil & J. A. Planell

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  1. D. Rodríguez
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  2. J. M. Manero
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  3. F. J. Gil
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  4. J. A. Planell
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Rodríguez, D., Manero, J.M., Gil, F.J. et al. Low cycle fatigue behavior of Ti6Al4V thermochemically nitrided for its use in hip prostheses. Journal of Materials Science: Materials in Medicine 12, 935–937 (2001). https://doi.org/10.1023/A:1012892511845

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