Comparative study of nitrogen implantation effect on mechanical and tribological properties of Ti-6Al-4V and Ti-10Zr-10Nb-5Ta alloys

Stéphanie Carquigny,Steliana Ivanescu,Jamal Takadoum

doi:10.1051/epjap/2019180149

Abstract

The effect of nitrogen implantation on mechanical and tribological properties of Ti-6Al-4V and Ti-10Zr-10Nb-5Ta alloys was studied. Increasing implantation dose from 1 × 1016N+/cm2to 2 × 1017N+/cm2leads to increase gradually both hardness and Young's modulus. The results show that implantation of 2 × 1017N+/cm2allowed to double the value of Young's modulus and to triple the value of hardness. Friction tests that have been conducted against 100Cr6 steel and alumina balls showed that tribological behavior of the two alloys depend on the nature of the counterpart material and is strongly affected by the implanted dose of nitrogen.

Highlights

Due to the formation of very stable, continuous, highly adherent and protective oxide on their surface [1,2], titanium alloys show an excellent resistance to corrosion
In a previous paper [8], we have conducted a comparative study of corrosion and tribocorrosion between Ti-6l-4V and Ti-10Zr-10Nb-5Ta alloy and we have shown that the latter has better electrochemical behavior
Ti-6Al-4V and Ti-10Zr-10Nb-5Ta alloys were implanted with nitrogen at three doses 1 Â 1016 N+/cm2, 5 Â 1016 N+/ cm2 and 2 Â 1017 N+/cm2

Summary

Introduction

Due to the formation of very stable, continuous, highly adherent and protective oxide on their surface [1,2], titanium alloys show an excellent resistance to corrosion Since they are biocompatible and have low density and high specific strength, they are being increasingly used for medical implants. Beta-type titanium based alloys with various compositions have been elaborated and studied by numerous researchers: Ti-29Nb-13Ta-4Zr [7], Ti-10Zr-10Nb-5Ta [8], Ti-Nb [9,10], Ti-15Mo-3Nb-3Al [11], Ti6-Al7-Nb [12], Ti-6Al-4V-1Zr [13] In all these studies, the authors reported the high potential of these materials to be used for medical implants. We report new results concerning the effect of

Materials and methods

Hardness and young’s modulus measurements

Ti-6Al-4V alloy

Conclusion