Corrosion Behavior and Wear Resistance for Ti-18Nb-xCu Alloys

Abstract

Corrosion behavior and wear resistance were investigated for three prepared alloys (Ti-18Nb-xCu) by powder metallurgy method with adding three weight percents of Cu (5, 7 and 9 wt %). The wear results show that Ti-18Nb-7Cu alloy has the lowest wear rate due to hard Ti2Cu phase which mostly formed in the percent of 7%Cu. While the corrosion behavior was different due to the variation in formed cathodic and anodic sites and the formed phase led to increasing the formation of micro-galvanic cells on the alloys surface. AFM analysis was applied to show the surface topography and measure surface roughness, the results indicated that Ti alloy with 7% Cu had the highest surface roughness.