Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
TRIBOLOGICAL EVALUATION OF BORIDED TI6AL4V ALLOY FOR BIOMEDICAL APPLICATIONS
Submission Author:
Guilberth Hobold , PR
Co-Authors:
Luiz Guariglia, Carlos augusto Henning Laurindo, Paulo Soares, Guilberth Hobold
Presenter: Guilberth Hobold
doi://10.26678/ABCM.COBEM2017.COB17-1953
Abstract
The Ti6Al4V alloy is frequently used in joint prosthesis, due to its biocompatibility and corrosion resistance, as a result of its naturally formed oxide layer. Despite the alloy being present in a wide range of applications, it has poor tribological properties, which limit its lifespan. By this reason, this study was conducted to evaluate the effects of boriding on improving the tribological properties of the alloy. The thermochemical and electrochemical treatments of boriding were performed, obtaining significantly better properties, and increasing wear resistance. For both types of treatment, it was used Ekabor and Borax boriding agents, to compare the efficiencies of the modified layer. Borided samples were evaluated by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. Also, surface hardness test and the microhardness profile test were carried out, to verify the changes in the mechanical properties. Tribological test was done using the reciprocal linear mode, on samples with and without thermochemical treatment. Borided samples presented the formation of layers with higher hardness and more resistant to wear. Borided samples also showed a higher coefficient of friction, due to the higher roughness resulting from the treatment.
Keywords
biomaterial, Boriding, titanium, wear resistance, tribology.
