Erosion behavior and damage evolution of Ti-6Al-4V aeroengine titanium alloy

This paper studies sand- and dust-erosion damages of aero-engine titanium alloy blades, and associated damage mechanism was discussed with the simulation of actual dust environment. The abrasion test of TC4 titanium alloy was carried out by high-speed erosion equipment. The roughness, micro-damage morphology, and stress distribution of titanium alloy were characterized by the roughness tester, SEM and XRD residual stress gauges, respectively. The results show that the erosion rate of titanium alloy matrix increases with the erosion time, while its roughness does not vary significantly. However, the roughness and residual compressive stress sharply rise with erosion rate. As the erosion time progresses, the surface morphology exhibits cutting wear, and the worn surface center starts to peel off.