Wear behaviour of Electron beam surface melted Inconel 718

Abstract

This study concerns understanding the wear behavior of electron beam surface melted Inconel 718. Electron beam surface melting has been carried out using an indigenously developed electron beam welding machine with a capacity of 80kV, 12 kW. Surface melting has been carried under a varied combination of beam current and scan speed to optimize the process parameter of electron beam melting corresponding to the development of defect free processed zone. Detailed investigation of microstructure, phase, hardness, and reciprocating friction wear have been carried out. Finally, the fretting wear behavior of electron beam melted Inconel 718 has been evaluated against tungsten carbide ball under fretting wear mode and compare with the fretting wear behavior of as received Inconel 718. Finally, the mechanism and kinetics of wear have been investigated threw a detail microstructure analysis of the worn surface.