Mechanical and Tribological Properties of Hot Isostatically Pressed [alpha] + [beta] Ti-Alloys

Ti-alloys are widely used in biomedical devices and components, due to their desirable properties, such as low modulus, biocompatibility and corrosion resistance. Microstructural modification is often performed in order to improve physical, mechanical and tribological properties. This study aims to...

Full description

Saved in:
Bibliographic Details
Published inTrends in biomaterials & artificial organs Vol. 35; no. 1; pp. 15 - 19
Main Authors Guerrab, Fahima, Fellah, Mamoun, Hezil, Naouel, Said, Mechachti, Montagne, Alex, Ios, Alain, Elhussein, Akram
Format Journal Article
LanguageEnglish
Published Society for Biomaterials and Artificial Organs 01.01.2021
Subjects
Aluminum oxide
Degassing of metals
Hardness
Mechanical properties
Metals
Porosity
Specialty metals industry
Titanium alloys
Tribology
Canada
Online AccessGet full text

Cover

More Information
Summary:Ti-alloys are widely used in biomedical devices and components, due to their desirable properties, such as low modulus, biocompatibility and corrosion resistance. Microstructural modification is often performed in order to improve physical, mechanical and tribological properties. This study aims to examine the effect of Nb content on mechanical and tribological behavior of Hot Isostatic Pressed (HIPed) Ti-6Al-xNb alloys (x= 0, 2, 5 and 7 at. %) for orthopedics application. Porosity, hardness, Young's modulus and tribological behavior of the nanostructured Ti6Al-7Nb alloys were investigated. The friction and wear tests were carried out under different applied loads of 2, 8 and 16 N, with alumina [alpha]-[Al.sub.2][O.sub.3] balls, using an Oscillating tribometer. The mechanical characterization indicated that Young's modulus and hardness increased with increasing Nb content. Addition of Nb led to decrease friction coefficient and wear rate. The lowest values of friction coefficient, volume and wear rate were obtained for samples containing 7 at.% of Nb tested under an applied load of 2 N. This enhancement in tribological properties is due to the grain size refinement, low porosity and high relative density of Ti-6Al with 7 at.% of Nb.
ISSN:0971-1198