In many sense, the role of a corrosion film and a surface coating in fatigue crack initiation is
similar. The performance of the TiAlN and TiAlN/CrN PVD coatings in resisting fretting fatigue
failure of the AISI P20 steel was investigated. A significant increase in fretting fatigue
life was observed; up to 210% and 193% when clamped at 5.6 kN and 12.6 kN, respectively
for the TiAlN coated specimens, and up to 798% and 762% when clamped at 5.6 kN and
12.6 kN, respectively for the multilayer TiAlN/CrN coated specimens. Both PVD coatings
showed a beneficial compressive residual stress and substantial increases in its resistance
to plastic deformation (H3
/E2
) as well as surface hardness compared to the uncoated AISI
P20 tool steel.
2015 Elsevier Ltd