Effects of grain boundary chemistry and precipitate structure on intergranular corrosion in Al-Mg-Si alloys doped with Cu and Zn
Bartawi, Emad H.; Marioara, Calin Daniel; Shaban, Ghada; Rahimi, Ehsan; Mishin, Oleg V.; Sunde, Jonas Kristoffer; Gonzales-Garcia, Yaiza; Holmestad, Randi; Ambat, Rajan
Peer reviewed, Journal article
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Date
2024Metadata
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- Institutt for fysikk [2772]
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Abstract
Al-Mg-Si alloys are known as structural materials and are primary alloys in the automotive industry to achieve weight reduction. Shifting toward sustainability, lower energy consumption, and less CO2 emission necessitates recycling. However, the unavoidable accumulation of scrap-related impurities, e.g., Cu and Zn, during the recycling process can influence corrosion resistance of recycled alloys. The results show that Al-Mg-Si alloys containing 0.05 wt% Cu exhibit low intergranular corrosion resistance. The intergranular corrosion resistance of these alloys is notably improved by adding 0.06 wt% Zn. Low concentrations of Cu and Zn are found to strongly affect the crystal structure of hardening precipitates.