PSI - Issue 18

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G.M. Dominguez Almaraz et al. / Procedia Structural Integrity 18 (2019) 594–599 Author name / Structural Integrity Procedia 00 (2019) 000–000

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(a) (b) Fig. 5. (a) Ultrasonic fatigue endurance for 4140T steel, (b) Ultrasonic fatigue endurance for 1045 steel (logarithmic scale).

Fig. 6. (a) Fracture surface for 4140T steel with 360 MPa of load, (b) Fracture surface for 4140T steel with 340 MPa of load.

Slow propagation crack zone

Fig. 7. (a) Fracture surface for 1045 steel with 280 MPa of load, (b) Fracture surface for 1045 steel with 260 MPa of load.