Crack Paths 2012

200Pm

200 P m

03D¥P N=0.75

R ol =1.6: K I =21.4 03D¥P N=0.67

Rol=1.8: KI=24.1

200 P m

200 P m

R ol =2.0: K I =27.0 03D¥P N=0.84

Rol=2.1: KI=28.1 03D¥P N=0.86

200 P m

200 P m

Rol=2.2: KI=29.9 03D¥P N=0.93

Rol=2.4: KI=33.1 03D¥P N=1.03

Figure 5. Microstructural effects at the crack tip obtained with pulsed reflection

microspcope on SENB3specimen for different overload ratios Rol.

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