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Chinese Script vs Plate-Like Precipitation of Beta-Al9Fe2Si2 Phase in an Al-6.5Si-1Fe Alloy

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Abstract

The microstructure of a high-purity Al-6.5Si-1Fe (wt pct) alloy after solidification at various cooling rates was investigated. In most of the cases, the monoclinic beta-Al9Fe2Si2 phase was observed as long and thin lamellae. However, at a very slow cooling rate, Fe-bearing precipitates with Chinese script morphology appeared together with lamellae. Further analysis showed all these Chinese script precipitates correspond also to the monoclinic beta phase. This finding stresses that differentiating second phases according to their shape may be misleading.

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Financial support from the European Space Agency (Contract #4200014347) through the MICAST program was greatly appreciated.

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Author notes

  1. Deni Ferdian (PhD Student, Lecturer)

    Present address: Department of Metallurgy and Materials Engineering, Universitas Indonesia, Kampus Baru UI, Depok, 16424, Indonesia

Authors and Affiliations

  1. CIRIMAT, Université de Toulouse, ENSIACET, CS 44362, 31030, Toulouse Cedex 4, France

    Deni Ferdian (PhD Student, Lecturer), Claudie Josse (Research Associate), Yannick Thebault (Research Associate), Benoit Malard (Assistant Professor) & Jacques Lacaze (Senior Scientist)

  2. CNES, 18 Avenue Édouard Belin, 31400, Toulouse, France

    Patrick Nguyen (PhD Student)

  3. LEM3, UMR CNRS 7239, Université de Lorraine, 57045, Metz, France

    Nathalie Gey (Research Scientist)

  4. CEMES, 29 Rue Jeanne Marvig, 31055, Toulouse Cedex 4, France

    Nicolas Ratel-Ramond (Research Associate)

  5. GET, OMP, UMR 5563, 14 Avenue E. Belin, 31400, Toulouse, France

    Philippe de Parseval (Research Associate)

  6. Université de Grenoble Alpes, SIMAP, 38000, Grenoble, France

    Luc Salvo (Professor)

Authors
  1. Deni Ferdian
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  2. Claudie Josse
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  3. Patrick Nguyen
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  6. Philippe de Parseval
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  8. Benoit Malard
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  9. Jacques Lacaze
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  10. Luc Salvo
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Corresponding author

Correspondence to Deni Ferdian.

Additional information

Manuscript submitted October 13, 2014.

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Ferdian, D., Josse, C., Nguyen, P. et al. Chinese Script vs Plate-Like Precipitation of Beta-Al9Fe2Si2 Phase in an Al-6.5Si-1Fe Alloy. Metall Mater Trans A 46, 2814–2818 (2015). https://doi.org/10.1007/s11661-015-2917-1

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  • DOI: https://doi.org/10.1007/s11661-015-2917-1

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