The Influence of Wheel/Rail Contact Conditions on the Microstructure and Hardness of Railway Wheels

Figure 16

Composite OM image showing RCF crack in Region E3, viewed in a circumferential direction on a cross section. Running surface at top of image, field side to right. Crack length 6.2 mm, depth 2 mm. Note branching at crack tip and deformed microstructure above crack. This image is from a different cross section of the same wheel shown in Figure 14, selected to show a longer crack.