Wear behavior of in-situ oxide dispersion strengthened Fe-8Ni alloy with Zr additions

In this study, in-situ oxide dispersion strengthened (ODS) Fe₉₁Ni₈Zr₁ and Fe₈₈Ni₈Zr₄ alloys were produced by combination of high energy mechanical alloying (HEMA) and high temperature equal channel angular extrusion (HT-ECAE). The wear behaviors of the consolidated samples were investigated under different loads from 1 N to 4 N by reciprocating wear tests at room temperature. The Scanning electron microscopy (SEM) was used to examine the wear tracks to analyze the wear characteristics as a function of applied loads. The relative comparison of the wear results showed that under the lower loads of 1 N and 2 N, Fe₈₈Ni₈Zr₄alloy has lower wear rate than Fe₉₁Ni₈Zr₁ alloy whereas under the higher loads of 3 N and 4 N, it is vice versa. Additionally, the friction coefficient of Fe₉₁Ni₈Zr₁ alloy was found to be lower than that of Fe₈₈Ni₈Zr₄alloy under all the applied loads. The results were comparatively discussed with respect to microstructural features of 1 at% Zr and 4 at% Zr containing ODS alloys produced by HEMA followed by ECAE.