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The Solidification Behavior of Mg-9Al-2Ca Alloy under Furnace Cooling

  • Metallic Materials
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Abstract

To understand the solidification pathway and microstructure evolution of Mg-9Al-2Ca alloy, the cooling curve of the alloy solidified under furnace cooling was measured and the water-quenched samples were observed. The experimental results show that the matrix phase of α-Mg dendrites is first generated at 596 °C during the solidification process, then the eutectic phases of Al2Ca and Mg17Al12 are formed at 518 and 447 °C, respectively, and the solidification is terminated at 436 °C. In the process of solidification, the seaweed dendrites of α-Mg get coarser and are gradually transformed into the global dendrites; besides, the secondary dendrite arms spacing (SDAS) of α-Mg as well as the solid fraction are both increased, while the increasing rate of SDAS of α-Mg and the solid fraction in the temperature region of 600–550 °C is faster than that in the temperature region of 550–436 °C. And a power function relationship can be used to illustrate the change of the SDAS and the solid fraction with the temperature of solidification.

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Funding

Funded by the Ph D Research Startup Foundation of Jining University(No.2017BSZX02)

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Authors and Affiliations

  1. School of Physical Science and Intelligent Engineering, Jining University, Qufu, 273155, China

    Huanming Ji  (冀焕明)

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  1. Huanming Ji  (冀焕明)
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Correspondence to Huanming Ji  (冀焕明).

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Ji, H. The Solidification Behavior of Mg-9Al-2Ca Alloy under Furnace Cooling. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 37, 735–739 (2022). https://doi.org/10.1007/s11595-022-2589-9

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  • DOI: https://doi.org/10.1007/s11595-022-2589-9

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