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Grain Refinement Behavior of Al-Zn-Si Alloy by Inoculation in Hot-Dip Coating

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Light Metals 2015

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Abstract

Grain refinements were an effective method to improve the mechanical properties of aluminium alloy, and heterogeneous nucleation was widely applied in industry to achieve a grain-refined. In this study, grain refinement behavior of 55%Al-Zn-1.6%Si alloy by Al-Ti-B was investigated. In order to obtain the microstructure in situ, high-temperature liquid quenching by stainless steel pipe was used to capture the sample snapshots. Then, the effect of Al-5Ti-0.2B on the alloy was analyzed by microstructure, solid fraction and grain size. Our results show that the grain size of 55Al-Zn-Si alloy decreased after the Al-5Ti-0.2B addition to some extent, and in order to understand the effect of refinement, it was necessary to analyze the mechanisms of Ti in 55Al-Zn-Si alloy. Meanwhile, during the process of solidification, the solid fraction of 55Al-Zn-Si alloy was further increased with the temperature decreasing, and the result was consistent with our calculation of phase diagram. Finally the reactions were identified using calculation of phase diagram.

Corresponding author. Tel.: +86 021 56337920; fax.: +86 021 56337920 E-mail address: gxwu@shu.edu.cn (Guangxin Wu)

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Authors and Affiliations

  1. Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai, 200072, China

    Wangjun Peng, Guangxin Wu, Xuan Dai, Jieyu Zhang, Weidong Hu & Kuochih Chou

  2. Department of Physical Chemistry, University of Science and Technology, Beijing, 100082, China

    Kuochih Chou

Authors
  1. Wangjun Peng
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  2. Guangxin Wu
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  3. Xuan Dai
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  4. Jieyu Zhang
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  5. Weidong Hu
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  6. Kuochih Chou
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Editors and Affiliations

  1. Department of Chemical and Materials Engineering, University of Auckland, New Zealand

    Margaret Hyland (professor; Deputy Dean of the Faculty of Engineering; and a principal investigator in the Light Metals Research Centre; Ph.D. in Chemistry) (professor; Deputy Dean of the Faculty of Engineering; and a principal investigator in the Light Metals Research Centre; Ph.D. in Chemistry)

  2. University of Western Ontario, Canada

    Margaret Hyland (professor; Deputy Dean of the Faculty of Engineering; and a principal investigator in the Light Metals Research Centre; Ph.D. in Chemistry) (professor; Deputy Dean of the Faculty of Engineering; and a principal investigator in the Light Metals Research Centre; Ph.D. in Chemistry)

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© 2015 TMS (The Minerals, Metals & Materials Society)

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Peng, W., Wu, G., Dai, X., Zhang, J., Hu, W., Chou, K. (2015). Grain Refinement Behavior of Al-Zn-Si Alloy by Inoculation in Hot-Dip Coating. In: Hyland, M. (eds) Light Metals 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48248-4_51

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