Fretting wear behavior of Zn-Ni alloy coatings

Hysteresis fretting loops of the tests showed that for both coatings, at ±70 μm displacement remains in no slip condition, at ±100 μm in the mixed slip condition, and at ±150 μm displacement remains in gross slip condition. Although the coatings had similar stick-slip behavior, the smoother coating has a slower progression of wear from the no slip to gross slip conditions than the rougher coatings. Also, differences in the wear scar morphologies are attributed to the differences in the coating morphologies, which resulted in different wear and velocity accommodation mechanisms.