Fatigue behavior and physical characterization of surface-modified Ti-6Al-4V ELI alloy by micro-arc oxidation

Anodizing has proven an effective method for preparing bioactive titanium and has been the subject of many studies regarding the performance and biological characterization of the layers obtained. However, the fatigue behavior of titanium alloys, after undergoing this process is still poorly studied...

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Published inMaterials research (São Carlos, São Paulo, Brazil) Vol. 15; no. 2; pp. 305 - 311
Main Authors Potomati, Fernanda, Giordani, Enrico José, Duarte, Laís Tereza, Alcântara, Nelson Guedes de, Bolfarini, Claudemiro
Format Journal Article
LanguageEnglish
Portuguese
Published ABM, ABC, ABPol 01.04.2012
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Subjects
anodic oxidation
Anodizing
ENGINEERING, CHEMICAL
fatigue
Fatigue (materials)
Fatigue tests
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Oxidation
Polished
Scanning electron microscopy
surface modification
titanium alloy
Titanium base alloys
X-ray photoelectron spectroscopy
titanium alloy
fatigue
surface modification
anodic oxidation
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Summary:Anodizing has proven an effective method for preparing bioactive titanium and has been the subject of many studies regarding the performance and biological characterization of the layers obtained. However, the fatigue behavior of titanium alloys, after undergoing this process is still poorly studied. This study aims to investigate the influence of MAO (Micro-Arc Oxidation) process on the fatigue properties of titanium alloy Ti-6Al-4V. Therefore axial fatigue tests were performed to obtain SxN curves, of specimens in polished and anodized (MAO processed, phosphate salt solution, potential of 290 V) conditions. Roughness measurements, SEM, Raman spectra and X-ray photoelectron spectroscopy (XPS) analyses were used to characterize the features of the modified surface. SEM was also used to analyze the fatigue fractures of the tested specimens. The MAO process, with the parameters used in this investigation, had no influence on the fatigue behavior of the Ti-6Al-4V alloy, when compared to specimens without surface modification.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/S1516-14392012005000012