PSI - Issue 5

G. Lesiuk et al. / Procedia Structural Integrity 5 (2017) 904–911 Lesiuk et al. / Structural Integrity Procedia 00 (2017) 000 – 000

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Fig.4. Experimental set up: a) testing machine with specimen in grips, b) instrumented HP VEE environment for  H collection during FCGR experiments

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Fig. 5. Kinetic fatigue fracture diagrams for 42CrMo4 steel and 41Cr4 steel ( R =0.1, R =0.5) based on  K applied and  K eff

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Fig. 6. Kinetic fatigue fracture diagram for 41Cr4 steel based on  H parameter (a) and S355J2W steel based on  J parameter (b)

As it was expected, the kinetics of fatigue crack growth (despite different microstructure) for 41Cr4 and 42CrMo4 steel for similar static properties is achieved. The differences in kinetics of fatigue crack growth for R =0.1 and R =0.5