Fine grain structure as palliatives for fretting wear of inconel 718 alloy at various temperatures

Abstract

In this study, the effectiveness of an ultrasonic nanocrystalline surface modification (UNSM) technique on the fretting wear and frictional properties of a nickel-based super alloy Inconel 718, which was developed for use in rotating part in aerospace and gas turbine applications, was investigated at various temperatures. The results showed that the UNSM-treated specimens reduced the friction coefficient and palliated the fretting wear compared to the untreated conventional specimens, which may be attributed to the fine grain structure, decrease in surface roughness and increase in surface hardness. Also, it was found that the UNSM technique had no effect on the chemical composition of Inconel 718 alloy.