Abstract
This study investigates the influence of ultrasonic-assisted abrasive peening (UAP) on the microstructural evolution and corrosion characteristics of Al-6061 alloy. A 3min peened sample demonstrated a 50% reduction in grain size and a 14-fold increase in residual stress compared to its unpeened state. The corrosion rate for the 3min peening also decreased to 9.42 × 10-3mm/year, compared to 89.4 × 10-3mm/year for the unpeened alloy specimen. Peening beyond 3min was observed to be susceptible to pitting. Hence, the UAP is found to be an effective method of improving the corrosion resistance of Al-6061.
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