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http://dx.doi.org/10.14773/cst.2012.11.4.151

Investigation on surface hardening and corrosion characteristic by water cavitation peening with time for Al 5052-O alloy  

Kim, Seong-Jong (Division of Marine Engineering, Mokpo Maritime University Mokpo City)
Hyun, Koang-Yong (Division of Marine Engineering, Mokpo Maritime University Mokpo City)
Publication Information
Corrosion Science and Technology / v.11, no.4, 2012 , pp. 151-156 More about this Journal
Abstract
The cavity formed by the ultrasonic generation in the fluid with the application of water cavitation peening collides into the metal surface. At this time, the surface modification effect such as the work hardening presents by the compressive residual stress formed due to the localized plastic deformation. In this investigation, the water cavitation peening technology in the distilled water with the lapse of time was applied to 5052-O aluminum alloy for aluminum ship of a high value. So, the optimum water cavitation peening time on the effect for surface hardening and anti-corrosion property was investigated. Consequently, the water cavitatin peening time on excellent hardness and corrosion resistance characteristic presented 3.5 min. and 5.0 min, respectively. The surface hardness in the optimum water cavitation peening time was improved approximately 45% compared to the non-WCPed condition. In addition, corrosion current density was decreased.
Keywords
aluminium alloy; water cavitation peening; surface hardening; corrosion resistance; micro-droplet cell;
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