Investigation on oxide scale of low-cost Ti-6Al-4V substitution alloys composition

Abstract

Ti-6Al-4V has been a well-structural material in aerospace applications for both airframes and engine components. Considering corrosion resistance is an essential characteristic of Ti-6Al-4V, substituting the low-cost element may significantly influence the oxide scale because the oxide scale significantly impacts oxidation resistance. The oxidation behavior of oxide scale formation will be studied using Ti-6Al-4V as a reference alloy and the previous research article with a low-cost element substituted. When compared to the reference alloys, the development of various oxide scales and the properties of the formed oxide scale will be extensively examined and contrasted to provide a clearer image of whether the same oxide scale or a different oxide scale composition will be formed. When titanium alloys are exposed to oxygen, the most frequent oxide scale is TiO2, whereas Al2O3 is the most desirable oxide scale for titanium alloys due to its properties in strengthening oxidation resistance. Iron is the most popular low-cost element used among researchers to resolve this issue, whether it is added or substituted with a beta-phase element such as vanadium in Ti-6Al-4V.