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The effect of an addition of Sc and Zr on the precipitation behavior of AA6061 alloy

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Abstract

The effect of an addition of Sc and Zr on the precipitation behavior of AA6061 alloy was investigated. AA6061 alloy containing Sc and Zr showed different age hardening behavior compared to unadulterated AA6061 alloy. The hardness of the AA6061 alloy peaked when aged for 5 h at 190 °C due to the formation of β″ phases, whereas that of AA6061 alloy containing Sc and Zr peaked at 12 h of aging, and was greater than that of AA6061 alloy when aged for 24 h to 36 h. Thermally stable Al3(Sc, Zr) phases with a L12 structure and low density of β″ phases were found in the Sc- and Zr-added AA6061 alloy aged for 5 h at 190 °C. Transmission electron microscopy (TEM) and differential scanning calorimetry (DSC) revealed that the precipitation rate of the β″ phases was retarded by the addition of Sc and Zr to AA6061 alloy.

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Authors and Affiliations

  1. Division of Advanced Materials Engineering & Research Center of Advanced Materials Development, Chonbuk National University, Jeonbuk, 561-756, Korea

    Eui Pyo Kwon, Kee Do Woo, Sang Hyuk Kim, Duck Soo Kang & Jae Yeol Jeon

  2. Lightweight Components Team, Korea Institute of Industrial Technology, Gwangju, 500-480, Korea

    Kwang Jin Lee

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  1. Eui Pyo Kwon
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  2. Kee Do Woo
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  3. Sang Hyuk Kim
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  6. Jae Yeol Jeon
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Correspondence to Kee Do Woo.

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Kwon, E.P., Woo, K.D., Kim, S.H. et al. The effect of an addition of Sc and Zr on the precipitation behavior of AA6061 alloy. Met. Mater. Int. 16, 701–707 (2010). https://doi.org/10.1007/s12540-010-1002-y

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