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Grain refining of Al-4.5Cu alloy by adding an Al-30TiC master alloy

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Abstract

A particulate Al-30 wt pct TiC composite was employed as a grain refiner for the Al-4.5 wt pct Cu alloy. The composite contains submicron TiC particles. The addition of the TiC grain refiner to the metal alloy in the amount of 0.1 Ti wt pct effected a remarkable reduction in the average grain size in Al-4.5 wt pct Cu alloy castings. With the content of over 0.2 Ti wt pct, the grain refiner maintained its refining effectiveness even after a 3600-second holding time at 973 K. The TiC particles in the resulting castings were free of interfacial phases. It is concluded that the TiC are the nucleating agents and that they are resistant to the “fading effect” encountered with most grain refiners.

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Author notes

  1. Kazuaki Sato (Research Scientist, Assistant Manager)

    Present address: Department of Materials Science and Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA

Authors and Affiliations

  1. Material Engineering Division III, Toyota Motor Corporation, 410-11, Shizuoka, Japan

    Kazuaki Sato (Research Scientist, Assistant Manager)

  2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA

    Merton C. Flemings (Toyota Professor of Materials Processing)

Authors
  1. Kazuaki Sato
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  2. Merton C. Flemings
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Sato, K., Flemings, M.C. Grain refining of Al-4.5Cu alloy by adding an Al-30TiC master alloy. Metall Mater Trans A 29, 1707–1710 (1998). https://doi.org/10.1007/s11661-998-0093-2

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  • DOI: https://doi.org/10.1007/s11661-998-0093-2

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