SOME PROPERTIES OF BIOMEDICAL Ti6Al4V ALLOY IN DIFFERENT SOLUTIONS

Abstract

 The aim of the present investigation is to study the effect of different simulated solutions on
wear behavior, chemical properties and ion release of Ti-6Al-4V alloy which used in human
body. For this purpose three solutions have been used (Hank's solution, 0.9NaCl and
artificial saliva). The corrosion properties of Ti-6Al-4V implant alloy were examined at
37ºC by using electrochemical techniques, such as the potentiodynamic method and open
circuit potential (OCP). The electrochemical corrosion characteristics of Ti-6Al-4V implant
alloys in three biological solutions were measured in terms of the corrosion potential (Ecorr)
and the corrosion current density (icorr ).Wear behavior was investigated by using pin-ondisc
tribometers at human temperature under different loads (10,15,20)N. The wear test
consisted of measuring the weight loss of samples. The metal ion release of base and
alloying element by immersed specimens into various solutions for 7 days (168 hours) at
37ºC. The result found that the Ti6Al4V implant alloy in three biological solutions exhibited
a characteristic of a good behavior. The superior corrosion resistance these alloy which
current density measured in (nA/cm
2
). The weight loss of samples by wear test increase with
increase load and time. After applied heat treatment, about 40% enhancement in the wear
behavior of alloy. The quantity of Al element metal release of implant alloy with variation
fluids which increase with decrease the value of pH and little amount of vanadium element
in hank's solution.