Abstract
Due to their excellent mechanical properties and dimension stability, Direct Chill (DC) cast ingot plates of AA2618 alloy have been increasingly used for manufacturing large molds. The micro structure of the AA2618 DC cast alloy was examined in as-cast and solution-treated conditions using optical and scanning electron microscopes. The aging behavior of the non-deformed alloy at artificial and natural aging conditions was studied. The precipitation characteristics of the alloy were studied by differential scanning calorimetry and electrical conductivity measurement. The peak-aged conditions of the alloy were attained after aging for 36 h at 175°C, 10 h at 195°C, and 1 h at 215°C with hardness values of 99, 97, and 95 HRF respectively. It was found that the strengthening mechanisms of the natural and artificial aging were differently controlled by the formation of Cu-Mg co-clusters and/or GPB zones and S-Al2CuMg phase respectively.
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Shen, P., Elgallad, E.M., Chen, XG. (2016). On the Aging Behavior of AA2618 DC Cast Alloy. In: Sadler, B.A. (eds) Light Metals 2013. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-65136-1_65
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DOI: https://doi.org/10.1007/978-3-319-65136-1_65
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-65135-4
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