Tribocorrosion properties of different type titanium alloys in simulated body fluid

Tribocorrosion properties of different type titanium alloys in simulated body fluid Body fluids and relative motion between implant and bone lead to synergistic degradation reactions, which cause failed implantation or adverse tissue reactions for implant materials used in human body. Because of their good chemical biocompatibility as well as acceptable mechanical properties, titanium (CP Ti) and its alloys are widely used in implant applications. β-type Ti alloys including alloying elements such as Nb, Zr and Mo have become more popular among the extensively used α- and (α+β)-type Ti alloys due to their low elastic modulus, comparable mechanical properties and high biocompatibility. This paper was mainly aimed to investigate the electrochemical and tribological properties of β-type Ti alloys. Also, traditionally used α-type Ti (α- CP Ti) and (α+β) type Ti-6Al-4V (α/β- Ti64) alloys were included for comparing the same set of the results. The XRD and SEM investigations and hardness measurements were utilized to analyze the structure, surface morphology and mechanical behavior of the alloys. Simulated body fluid (SBF) was used as corrosive environment. Tribocorrosion tests were carried out at open circuit potential (OCP), cathodic and three different anodic potentials under reciprocating sliding condition. Potentiodynamic scans were obtained with and without wear test. Friction coefficient, current density and volume loss were measured and calculated. The relative motion accelerated the material loss in corrosive environment due to the combined effect of electrochemical reaction and tribological action. All Ti alloys had almost the same sensitivity to the potentiodynamic corrosion. The ratio of depassivation/repassivation affected wear performance of titanium and its alloys during tribocorrosion tests. The rate of chemical reaction was higher in β-type Ti-15Mo (β- Ti15) and Ti-45Nb (β- Ti45) alloys as compared to others. The (α+β) type Ti-6Al-4V (α/β- Ti64) and β type Ti-13Nb-13Zr (β- Ti1313) showed lower volume loss and lower friction coefficient values during tribocorrosion tests than others. The corrosion resistance of the β- Ti64 alloy exhibited better corrosion resistance than β- Ti1313 alloy. However, considering the implants applications, the β- Ti1313 alloy may be a good candidate with relatively low elastic modulus and without toxic alloying elements. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Wear Elsevier

Tribocorrosion properties of different type titanium alloys in simulated body fluid

Loading next page...
 
/lp/elsevier/tribocorrosion-properties-of-different-type-titanium-alloys-in-0jtGKmGAU0
Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0043-1648
eISSN
1873-2577
D.O.I.
10.1016/j.wear.2014.12.017
Publisher site
See Article on Publisher Site

Abstract

Body fluids and relative motion between implant and bone lead to synergistic degradation reactions, which cause failed implantation or adverse tissue reactions for implant materials used in human body. Because of their good chemical biocompatibility as well as acceptable mechanical properties, titanium (CP Ti) and its alloys are widely used in implant applications. β-type Ti alloys including alloying elements such as Nb, Zr and Mo have become more popular among the extensively used α- and (α+β)-type Ti alloys due to their low elastic modulus, comparable mechanical properties and high biocompatibility. This paper was mainly aimed to investigate the electrochemical and tribological properties of β-type Ti alloys. Also, traditionally used α-type Ti (α- CP Ti) and (α+β) type Ti-6Al-4V (α/β- Ti64) alloys were included for comparing the same set of the results. The XRD and SEM investigations and hardness measurements were utilized to analyze the structure, surface morphology and mechanical behavior of the alloys. Simulated body fluid (SBF) was used as corrosive environment. Tribocorrosion tests were carried out at open circuit potential (OCP), cathodic and three different anodic potentials under reciprocating sliding condition. Potentiodynamic scans were obtained with and without wear test. Friction coefficient, current density and volume loss were measured and calculated. The relative motion accelerated the material loss in corrosive environment due to the combined effect of electrochemical reaction and tribological action. All Ti alloys had almost the same sensitivity to the potentiodynamic corrosion. The ratio of depassivation/repassivation affected wear performance of titanium and its alloys during tribocorrosion tests. The rate of chemical reaction was higher in β-type Ti-15Mo (β- Ti15) and Ti-45Nb (β- Ti45) alloys as compared to others. The (α+β) type Ti-6Al-4V (α/β- Ti64) and β type Ti-13Nb-13Zr (β- Ti1313) showed lower volume loss and lower friction coefficient values during tribocorrosion tests than others. The corrosion resistance of the β- Ti64 alloy exhibited better corrosion resistance than β- Ti1313 alloy. However, considering the implants applications, the β- Ti1313 alloy may be a good candidate with relatively low elastic modulus and without toxic alloying elements.

Journal

WearElsevier

Published: May 1, 2015

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off