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Microstructure Evolution and Mechanical Properties of Rheo-Squeeze Cast Mg-9Al-1Zn Alloy by Experiments and Thermodynamic Calculation

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Abstract

Microstructure evolution and mechanical properties of Mg-9Al-1Zn alloy produced by rheo-squeeze casting (R-SQC) were investigated. It was revealed that R-SQC has produced high integrity castings with fine and uniform microstructure, diminished defects, and improved mechanical properties. The solid content in semi-solid slurry determined the grain size of α-Mg phase, the volume content, and distribution of β-Mg17Al12 phase, and predominantly controlled the mechanical properties. A two-stage thermodynamic calculation procedure to analyze R-SQC has been developed, and the solidification path and phase formation of Mg-9Al-1Zn alloy in R-SQC were discussed deeply.

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Acknowledgments

The authors gratefully acknowledge the support from the National Natural Science Foundation of China (50804023), the Luodi Research Plan of Jiangxi Educational Department (KJLD14016), the Nature Science Foundation of Jiangxi Province (20122BAB206021), and the Jiangxi Province Young Scientists Cultivating Programs (20122BCB23001). Partial supports came from the China Scholarship Council (CSC).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, P.R. China

    Hong-Min Guo (Professor) & Hua-Lan Jin (Lecturer)

  2. Key Laboratory of Near-Net Forming in Jiangxi Province, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi, 330031, P.R. China

    Hong-Min Guo (Professor), Shu-Guo Zhang (Ph. D Candidate), Xiang-Jie Yang (Professor), Xu-Bo Liu (Associate Professor) & Hua-Lan Jin (Lecturer)

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  1. Hong-Min Guo
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  2. Shu-Guo Zhang
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  3. Xiang-Jie Yang
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  4. Xu-Bo Liu
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  5. Hua-Lan Jin
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Correspondence to Hong-Min Guo.

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Manuscript submitted December 17, 2014.

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Guo, HM., Zhang, SG., Yang, XJ. et al. Microstructure Evolution and Mechanical Properties of Rheo-Squeeze Cast Mg-9Al-1Zn Alloy by Experiments and Thermodynamic Calculation. Metall Mater Trans A 46, 2134–2142 (2015). https://doi.org/10.1007/s11661-015-2813-8

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