Effect of pre-strain and work hardening rate on void growth and coalescence in AA5052

The effect of work hardening on void growth and coalescence was studied by pulling samples of aluminum alloy 5052 in tension to various amounts of pre-strains. To mimic voids forming during fracture, artificial micron-size voids were created in the pre-strained samples with an ultrafast laser. Void growth and coalescence was then followed in-situ under an optical microscope until failure. The effect of pre-strain on void growth rate and …