A study of erosion wear behavior of Inconel-718 nickel-based superalloy at different impingement angles

Abstract

Inconel-718 Nickel Based Superalloy used especially in aerospace applications materials are subject to solid particle erosion. Solid particle erosion causes the structural integrity of Inconel 718 materials to deteriorate. Therefore, it reduces the service life of the material. In this study, it is aimed to investigate the variation of Inconel-718 solid particle erosion resistance depending on the particle impingement angle. The erosion testing was carried out using air-jet erosion test rig (ASTM G76- 13) 30°,60° and 90° impingement angle. After the erosive wear tests, the eroded surfaces were examined with a three- dimensional (3D) optical surface profilometer. In order to provide the erosive wear distribution of Inconel 718, the proportions of the sections of the samples, the areal surface roughness values, the 3D surface topographies and the surface morphology were examined according to the surface impact properties. In conclusion, the maximum wear occurred at the impingement angle of 30°, which is an indication of ductile impressions. In addition, the surface roughness values and surface topographies have also changed significantly depending on the impact angle. It has deeper and wider craters at an impact angle of 30° and its craters are visualized by profilometry analysis.