High Temperature Friction and Wear Performance of PVD Coatings under Press Hardening Contact Conditions

Figure 8

Scanning electron micrographs (a) in secondary electron mode of Al-Si coated 22MnB5 steel strip tested against uncoated tool steel, (b) in secondary mode of Al-Si coated 22MnB5 steel that slid against CrWN coated tool steel, and (c) in backscatter mode of Al-Si coated 22MnB5 steel strip tested against CrWN coated tool steel showing the cracking behaviour; Note that different magnifications were employed and that arrows indicate the sliding direction.

(a)

(b)

(c)