Fig. 2From: Fatigue behavior of surfaced C45 steela As-received C45 steel ferritic pearlitic microstructure. b Core microstructure, pearlite (black), and thin grain boundary ferrite (white). c Interface microstructure, Widmanstatten ferrite (surfaced) and pearlite, and thin grain boundary ferrite (core). d Surfaced microstructure Widmanstätten ferriteBack to article page