Guo-jun Wang, Bai-qing Xiong, Yong-an Zhang, Zhi-hui Li,  and Pei-yue Li, Microstructural characterization of as-cast and homogenized 2D70 aluminum alloy, Int. J. Miner. Metall. Mater., 16(2009), No. 4, pp. 427-431. https://doi.org/10.1016/S1674-4799(09)60075-3
Cite this article as:
Guo-jun Wang, Bai-qing Xiong, Yong-an Zhang, Zhi-hui Li,  and Pei-yue Li, Microstructural characterization of as-cast and homogenized 2D70 aluminum alloy, Int. J. Miner. Metall. Mater., 16(2009), No. 4, pp. 427-431. https://doi.org/10.1016/S1674-4799(09)60075-3
Materials

Microstructural characterization of as-cast and homogenized 2D70 aluminum alloy

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  • Corresponding author:

    Guo-jun Wang    E-mail: wangguojun@nelat.com

  • Received: 19 August 2008
  • The microstructure of the as-cast 2D70 aluminum alloy and its evolution during homogenization were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analysis. The results indicate that the microstructure of the as-cast 2D70 aluminum alloy mainly consists of the dendritic network of aluminum solid solution and intermetallic compounds (Al2CuMg, Al2Cu, Al9FeNi, Cu2FeAl7, and Al7Cu4Ni). After conventional homogenization, Al/Al2CuMg eutectic phases are dissolved into the matrix, and a small amount of high melting-point eutectic Al/Al2Cu phases exist in the matrix, resulting in an increase in the starting melting temperature. Under double homogenization, the high melting point Al/Al2Cu phases are dissolved, and no obvious change is observed for the size and morphology of Al9FeNi, Cu2FeAl7, and Al7CuaNi compounds.
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