Fatigue strength of Ti-6A1-4V alloy with surface modified by TiO2 nanotubes formation

Autor(es)

Bortolan, Carolina Catanio ^[1] ; Campanelli, Leonardo Contri ^[1] ; Bolfarini, Claudemiro ^[1] ; Camarinho Oliveira, Nilson Tadeu ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Engn, Rod Washington Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 177, p. 46-49, AUG 15 2016.
• Citações Web of Science: 7

Resumo

Highly ordered arrays of TiO2 nanotubes are being considered as very promising to improve the osseointegration of titanium based implants to living tissues. However, this improvement must be accompanied by no drawback in the mechanical properties, which is the case of several surface modification techniques available for biomaterials. Therefore, this work investigated for the first time the effect of the surface modification by TiO2 nanotubes formation on the fatigue response of Ti-6A1-4V biomedical alloy. Highly organized nanotubes with an average diameter and length respectively of 90 and 600 nm were successfully produced by electrochemical anodization. Based on the standardized staircase method, fatigue tests of the treated specimens were conducted in physiological media at 37 degrees C, and compared to the untreated polished specimens. The mean and standard deviation values of the fatigue limit calculated through the Dixon-Mood equations were equal for both surface conditions. This result suggests that the employed condition of anodization was satisfactory on growing a nanotubes coating that was not deleterious to the fatigue performance of the alloy, what is a relevant achievement that assures the possibility of having high osseointegration and at the same time keeping the mechanical properties. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/11350-0 - Desenvolvimento de superfícies nanoestruturadas via eletroquímica em ligas biomédicas de titânio
• Beneficiário: Nilson Tadeu Camarinho de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 13/04423-3 - Comportamento em fadiga de ligas de titânio beta
• Beneficiário: Leonardo Contri Campanelli
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/01652-9 - Desenvolvimento de superfícies nanoestruturadas via eletroquímica em ligas biomédicas de titânio
• Beneficiário: Nilson Tadeu Camarinho de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores