Stages of ductile fracture 1. Initial necking 2. Small cavity formation (micro voids) 3. Void growth (ellipsoid) by coalescence into a crack 4. Fast crack propagation around neck. Shear strain at 45o 5. Final shear fracture (cup and cone) The interior surface is fibrous, irregular, which signify plastic deformation.
Stages of ductile fracture
1. Initial necking
2. Small cavity formation (micro voids)
3. Void growth (ellipsoid) by coalescence into a crack
4. Fast crack propagation around neck. Shear strain at 45o
5. Final shear fracture (cup and cone)
The interior surface is fibrous, irregular, which signify plastic deformation.