High Cycle Fatigue Behavior of Cold Forging Die Steel
High cycle fatigue behavior of the representative cold forging die steel, YXR3 with Rockwell C scale hardness number of 60.0 is investigated. Axial fatigue strength of plane and notched bar specimens with stress concentration factor, Kt of 1.5, 2.0 and 2.5 is presented. The emphasis is placed upon the subsurface crack initiation observed on notched specimens failed at number of cycles over than 106 cycles. Crack initiation and propagation mode of cold forging die steel is discussed with respect to fracture surface morphology.
M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee
R. Ebara et al., "High Cycle Fatigue Behavior of Cold Forging Die Steel", Key Engineering Materials, Vols. 417-418, pp. 225-228, 2010