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Inhibiting Brittle Intermetallic Layer in Magnesium/Aluminum Bimetallic Castings via In Situ Formation of Mg2Si Phase

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Abstract

A quasi-continuous Mg2Si layer is formed in situ at the magnesium/aluminum interface of bimetallic castings, by selecting a Si-containing aluminum alloy and overcasting process control. This effectively inhibits the formation of brittle intermetallic compounds (Al3Mg2, Al12Mg17) during the casting process, and the mechanisms are discussed based on phase diagram calculations and experimental validation. It is, thus, recommended to select Si-containing Al alloys as substrate for Mg/Al bimetallic castings.

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This work was financially supported by the National Science Foundation of China (Grant No. 51571080). The Ohio State University (OSU) is acknowledged for supporting this collaboration. One of the authors (ZZ) also expresses his gratitude to the China Scholarship Council for supporting his stay at OSU as a visiting scholar.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China

    Yiqing Chen, Hui Zhang, Ziang Zhu, Guangchen Xu & Lihua Liu

  2. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210, USA

    Ziang Zhu & Alan A. Luo

  3. Department of Integrated Systems Engineering, The Ohio State University, Columbus, OH, 43210, USA

    Alan A. Luo

Authors
  1. Yiqing Chen
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  2. Hui Zhang
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  3. Ziang Zhu
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  4. Guangchen Xu
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  5. Alan A. Luo
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  6. Lihua Liu
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Correspondence to Yiqing Chen or Alan A. Luo.

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Manuscript submitted October 8, 2018.

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Chen, Y., Zhang, H., Zhu, Z. et al. Inhibiting Brittle Intermetallic Layer in Magnesium/Aluminum Bimetallic Castings via In Situ Formation of Mg2Si Phase. Metall Mater Trans B 50, 1547–1552 (2019). https://doi.org/10.1007/s11663-019-01577-1

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  • DOI: https://doi.org/10.1007/s11663-019-01577-1

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