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.

Keywords

• Biomedical Alloy
• TiAlV alloy
• Different Solution
• Mechanical Properties