Fretting Wear Behavior of Ti Alloy under Different Cycles with Surface Texture

In aero engines, fretting wear of titanium alloy parts is inevitable. Studies have shown that surface texture can slow down fretting wear to a certain extent. However, the understanding of fretting wear behavior under different cycles is insufficient. The groove surface textures in different orientations are prepared on the surface of Ti-6Al-4V alloy by laser processing and different cycles of fretting wear tests are carried out. The results show that in the initial stage of wear, the fretting loops of samples with perpendicular grooves are "slimmer" than the others. As wear progresses, the distribution of wear debris changes, and the fretting loops of the 3 samples are similar. As the fretting cycle increases, the entire wear process can be divided into an adhesion stage and a stable stage. However, on samples with perpendicular grooves, the adhesion stage can be further subdivided into two stages according to whether the adhesion area is connected into one part. According to the distribution of wear debris and the results of EDS under different cycles, it can be found that the evolution of wear debris is the continuous grinding and oxidation of the large wear debris layer, which is converted into small pieces of wear debris, and finally into fine particle grinding. The research results have important theoretical significance for understanding the role of surface texture and the evolution of debris under different cycles in fretting wear behavior.