Abstract
The effect of pulse current on 5A90 Al-Li alloy with micro-cracks was studied in this work. The elongation, pore density and average pores size of 5A90 specimens with micro-cracks before and after the pulse current treatment was tested and compared. It is found that, after pulse current treatment, the elongation of 5A90 specimens with micro-cracks reached 26.4%, which is 4.3 times of the elongation of the untreated specimen. The pore density of the 5A90 sheet with microcracks is greatly reduced. The same trend is observed for the average diameter of the pores. The results indicate that the pulse current has a favorable repair effect on the artificial defects in 5A90 Al-Li alloy.
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