1.4571 | X6CrNiMoTi17-12-2 Fatigue Corrosion Cracking

In this case, the fatigue fracture was clearly recognizable macroscopically by beachmarks and planar fracture progression. In the SEM, the typical featherlike patterns of stress corrosion were found, but no unambiguous fatigue striations. A sharp edge at the intersection of two cooling channels served as crack initiation site.