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A Full View of the Segregation Evolution in Al–Bi Immiscible Alloy

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Abstract

Using synchrotron radiography, in this study, we caught a full view of the segregation evolution of Al–10 wt pct Bi immiscible alloy during solidification. We provide the direct experimental evidence of surface segregation prior to liquid decomposition. And the Bi enrichment at the bottom part should come from melt flow rather than Soret effect. The Marangoni effect and Stokes effect dominate in separate stages in solidifying Al–Bi alloy. Further, the size distribution of Bi droplets obeys Gaussian distribution.

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We thank all the staff members of the BL13W1 beam line of SSRF for providing support during these experiments and L. Zhang, Z.Y. Dai, and J.F. Zhang for helping to prepare for the synchrotron microradiography experiments. This work was supported by the National Natural Science Foundation of China (Nos. 51027005, 51271119, 51374144, and 51574165), Shanghai Municipal Natural Science Foundation (13ZR1420600), and Shanghai Rising-Star Program (14QA1402300).

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Author notes

  1. Shuguang Zhang is now deceased.

Authors and Affiliations

  1. School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, China

    Wenquan Lu, Shuguang Zhang, Wei Zhang, Qiaodan Hu & Jianguo Li

  2. School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, China

    Wenquan Lu

  3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    Jianding Yu

  4. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China

    Yanan Fu

Authors
  1. Wenquan Lu
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  2. Shuguang Zhang
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  3. Wei Zhang
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  4. Qiaodan Hu
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  5. Jianding Yu
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  6. Yanan Fu
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  7. Jianguo Li
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Corresponding authors

Correspondence to Qiaodan Hu or Jianguo Li.

Additional information

Manuscript submitted October 25, 2016.

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Lu, W., Zhang, S., Zhang, W. et al. A Full View of the Segregation Evolution in Al–Bi Immiscible Alloy. Metall Mater Trans A 48, 2701–2705 (2017). https://doi.org/10.1007/s11661-017-4082-1

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  • DOI: https://doi.org/10.1007/s11661-017-4082-1

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