Abstract
The effects of three different aging treatment processes, namely single-stage, double-stage, and reverse double-stage aging treatment processes, on the microstructures and mechanical properties of the AZ63 (Mg-6Al-3Zn-0.25Mn) casting magnesium alloy were investigated and compared. The results indicate that the microstructures of all the aged alloys under the three treatment processes are mainly composed of α-Mg, Mg17Al12, and Al4Mn phases, indicating that the double-stage and reverse double-stage aging treatments have no obvious effect on the type of alloy phases. However, as compared with the single-stage and double-stage processes, the reverse double-stage process has a great effect on the quantity of the Mg17Al12 phases. After the reverse double-stage aging treatment, which results in a stronger drive for decomposition of the supersaturated solid solution, the number of Mg17Al12 phases precipitated in the grains significantly increases. In addition, as compared with the single-stage aged alloy, the tensile properties at room temperature for both the double-stage and reverse double-stage aged alloys are significantly improved. Among them, the reverse double-stage aged alloy achieves the highest tensile strength, yield strength, and elongation of 295 MPa, 167 MPa, and 8.6%, respectively.
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Acknowledgements
This work was supported by the National Key R&D Program of China (Grant No. 2018YFB1106800), and the National Natural Science Foundation of China (Grant No. 51771152).
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Chun-yu Li Male, born in 1996, Master. His research interests focus on advanced magnesium alloy materials.
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Li, Cy., Wei, Hb., Ruan, Sh. et al. Effects of aging treatment processes on microstructures and mechanical properties of AZ63 casting magnesium alloy. China Foundry 20, 307–314 (2023). https://doi.org/10.1007/s41230-023-2169-4
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DOI: https://doi.org/10.1007/s41230-023-2169-4