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Enhancing mechanical properties and corrosion performance of AA6063 aluminum alloys through constrained groove pressing technique

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Abstract The use of a constrained groove pressing (CGP) method to plastically deform AA6063 aluminum alloy led to the improved surface properties. It was found that hardness magnitude is dramatically… Click to show full abstract

Abstract The use of a constrained groove pressing (CGP) method to plastically deform AA6063 aluminum alloy led to the improved surface properties. It was found that hardness magnitude is dramatically improved and its uniformity is considerably decreased after the first pass, while subsequent passes result in better hardness behavior for the processed material. Also, the elongated grains formed in the first pass of the CGP are gradually converted to the equiaxed counterparts by adding pass numbers. Eventually, higher corrosion resistance of the sample by imposing the CGP process is related to the quick formation of passivation film and the change in the morphology of the second phase and precipitates which hinder their electrochemical reactions and decrease the potential localized attack sites.

Keywords: corrosion; constrained groove; groove pressing; aa6063 aluminum

Journal Title: Transactions of Nonferrous Metals Society of China
Year Published: 2020

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