Research on impact-tangent composite fretting wear behavior of the directionally solidified crystal superalloy

Abstract

Aero-engine blades are pivotal components within aircraft, typically operating under high-temperature conditions that can lead to impact-tangent composite fretting wear due to vibrations and alternating loads. The intricate interplay between fretting wear and high temperatures can significantly influence the frictional and wear characteristics of these blades. In light of this, DZ4125 alloy, a directionally solidified crystal superalloy, has been selected as a representative material for studying aero-engine blade performance. The objective of this research is to delve into the impact-tangent composite fretting wear behavior and damage mechanisms of DZ4125 alloy. Dynamic response characteristics have been compared and discussed, and the worn surface's morphological features and chemical states have been examined using scanning electron microscopy (SEM), white-light interferometry (for 3D morphology), and energy-dispersive spectroscopy (EDS), among other techniques. Furthermore, the microstructural evolution has been investigated through electron backscatter diffraction (EBSD) analysis. This comprehensive dataset aims to elucidate the relationship between temperature and the fretting wear mechanisms of the DZ4125 alloy.